Table of Contents
Working with Object Transforms
In Roblox Studio, every visible object in your game world has a position, a size, and a rotation. Together, these three properties are often called the transform of an object. Learning how to move, scale, and rotate objects accurately is one of the most important hands-on skills in Roblox building, because every platform, wall, and decoration will rely on these actions.
This chapter focuses on how to control these transforms using the tools in Roblox Studio, and how to do it in a way that keeps your game clean, precise, and easy to edit later.
Important: Position, size, and rotation are separate.
Changing one does not automatically change the others.
Always check which tool you are using before clicking and dragging.
The Transform Tools
Roblox Studio provides three main transform tools in the toolbar. They are usually named Select, Move, Scale, and Rotate. The Select tool is for choosing objects, while the other three change their transform.
You can switch tools from the Home or Model tab in the Studio interface. The active tool controls what happens when you click and drag on an object. If something moves or stretches when you did not expect it, you probably have the wrong tool selected.
The Move tool changes where an object is located.
The Scale tool changes how big an object is.
The Rotate tool changes how an object is turned in 3D space.
You can only transform the object that is currently selected in the 3D view or in the Explorer window. If you want to transform several parts together, select them all first.
Moving Objects
When you select an object and then activate the Move tool, colored arrows appear around it. These arrows are called gizmos. Each arrow points along one of the three main world axes. Red is usually the X axis, green is the Y axis, and blue is the Z axis.
Dragging a single arrow moves the object along that axis only. Dragging the square areas between two arrows moves the object on the plane formed by those two axes. For example, dragging the square between the red and blue arrows will move the object left and right and forward and back, but not up or down.
By default, movement often snaps to a grid. This means the position of the object changes in fixed steps instead of completely smooth motion. You can see and change the move snap value in the Model tab. A larger snap value makes it easier to align platforms and walls in a clean way, but can make precise placement harder. A smaller value allows fine tuning but can lead to slightly uneven layouts if you are not careful.
You can also move objects by typing exact numbers into the Properties window. The Position property contains three values, often written as $(x, y, z)$. If you want a part to sit exactly on the ground, you can set its Y value so that the bottom of the part lines up with the ground. This numeric approach is slower than dragging, but it is very useful for exact alignment.
Rule: Use grid snapping for most movement, and only turn it down or off when you really need precise adjustments. This keeps your game world neat and reduces tiny gaps and overlaps.
If you accidentally move an object too far, remember you can undo with the standard undo shortcut. It is better to undo than to try to drag it back roughly into place.
Understanding Position in 3D Space
When you move an object, you are editing its position in 3D space. Roblox uses three axes that meet at right angles. The X axis goes left and right, the Y axis goes up and down, and the Z axis goes forward and back. An object’s position is stored as three numbers that tell you how far it is along each of these axes from the origin point.
You can think of the origin as the point $(0, 0, 0)$. If a part has a position of $(10, 5, -3)$, that means it is 10 units on X, 5 units on Y, and negative 3 units on Z from that origin. You normally do not need to calculate these values by hand, but understanding that each move changes one or more of these numbers helps you predict what will happen when you drag a specific arrow.
The arrows that appear with the Move tool can either be aligned with the world axes or with the object’s own rotation. Typically, beginners should keep them aligned to the world, because it is easier to understand. If you notice that the arrows are twisted in a strange way after rotating an object, you may have toggled between world and object space.
Scaling Objects
Scaling changes how big an object is. When you select a part and choose the Scale tool, little cubes appear at the edges and corners of the part. Dragging one of these cubes stretches or shrinks the part in that direction.
Dragging a cube on one face changes the size along a single axis, like length or width. Dragging a cube on a corner changes the size on two or three axes at once. While you drag, you can watch the Size property in the Properties window. It also uses three numbers: $(sizeX, sizeY, sizeZ)$.
By default, scaling also uses snapping. This means size changes happen in fixed steps. A grid size that works well for movement usually also works well for scaling, especially when building floors and walls that should line up perfectly.
If you scale a part that is not anchored, and it is touching something else, physics can sometimes cause it to fall or shift when you press play. It is often a good idea to adjust anchoring after you are happy with the size.
Rule: Try to keep object sizes in simple, clean numbers, such as whole numbers or simple decimals. This makes it easier to build levels that line up correctly and avoids tiny gaps that players can get stuck on.
You can also scale using exact values by editing the Size property directly. For example, you might set the size of a platform to $(10, 1, 20)$ to make a long, thin platform for an obby. Numeric scaling is very useful when you want identical parts, such as matching pillars or repeating platforms.
You should be careful when scaling detailed meshes or models from the Toolbox. Extreme scaling can stretch their textures or shapes in ways that look strange. For those objects, it is often better to build at the intended size from the start, or duplicate and move more copies instead of scaling too much.
Rotation Basics
Rotating an object turns it around an axis. When you select an object and click the Rotate tool, colored circles appear around it. These circles correspond to the X, Y, and Z axes. Dragging one of these circles rotates the object around that axis.
Rotating around the Y axis spins the object left and right, like turning a character to face a new direction. Rotating around the X axis tilts it forward and back. Rotating around the Z axis tilts it side to side. The exact result depends on the current rotation of the object, but this mental model is usually enough to predict what you will see.
Rotation, like movement and scale, can use snapping. With rotation snap on, the object rotates by fixed angles, such as 15 degrees or 45 degrees, for each step of your drag. This is very helpful for creating straight, regular structures, like rooms and platforms that are aligned with the world. If you want slanted ramps or more interesting angles, you can reduce the rotation snap to a smaller value or turn it off.
The rotation of a part is stored as three angles in degrees. These are sometimes called Euler angles. In the Properties window, you will see something like $(rotX, rotY, rotZ)$. You can type exact angles here if you want a precise rotation, such as a perfect 45 degree ramp.
Rule: For most building, keep rotation snap enabled with a clean angle like 15 or 30 degrees. Use smaller or no snap only when you really want unusual angles or organic shapes.
If you rotate an object that is already rotated, you may see numbers in the rotation fields that are not obvious, even if the object looks straight to your eye. This is normal and is caused by how 3D rotations work internally. As a beginner, you can usually ignore strange rotation values unless something behaves incorrectly.
Local vs Global Rotation and Movement
Transforms can be applied in two main ways. One aligns with the global world axes, and the other aligns with the local axes of the object itself. In global mode, moving or rotating along an axis always uses the main world directions. In local mode, the axes follow the rotated object.
For example, imagine you rotate a ramp so it points upward and forward. In global mode, the blue Z arrow still points along the world’s forward direction, which might not perfectly match the ramp. In local mode, the blue arrow will be aligned with the ramp’s length, so dragging it moves the ramp along its own direction.
Roblox Studio has an option that lets you switch between global and local transforms. This is very useful when you want to move or scale along the length of an angled object. Local mode lets you keep alignment with the object itself, while global mode keeps everything consistent with the world grid.
As a beginner, it is usually best to do most of your layout work in global mode so your buildings line up cleanly. When you have special angled pieces and you want to place them more precisely, you can temporarily switch to local mode.
Keeping Transforms Precise and Clean
Accurate transforms do more than make your game look neat. They also affect gameplay. Tiny gaps can cause players to trip or get stuck. Overlapping parts can create strange visual flickering or unexpected collisions.
To keep your transforms clean, try to follow a few simple habits. Use snapping whenever possible. Check the Properties of important parts to confirm that the position and size values are simple and consistent. If you duplicate parts, do not drag them randomly every time. Move them in straight lines using the Move tool arrows so they stay aligned.
When building platforms for obby games, it is especially important that the top surfaces are flat and at predictable heights. That way, jumps feel consistent to the player. Using the same Y position for several platforms makes that easy. For example, you might have a series of platforms with Y positions at 5, 10, and 15 to create a clear pattern of height.
If something looks almost right but still feels off, check for tiny rotations that were made by mistake. A platform that is rotated only a few degrees can cause characters to slide slightly. In many cases, setting a rotation axis back to exactly $0$ in the Properties window will solve this.
Using Transforms Together
In practice, you will combine moving, scaling, and rotating constantly. For example, you might create a new part, scale it into a long plank, rotate it into a ramp, then move it into position between two platforms. A good workflow is to start with size, then adjust rotation, and finally fine tune position.
If you change the size of an object after placing it, remember that scaling usually expands away from the part’s center. This can shift edges and corners out of alignment. After scaling, switch back to the Move tool and adjust the position again so everything lines up.
You can also transform multiple parts at once as a group. Select several parts and then use Move, Scale, or Rotate. This is helpful when you build a more complex shape and want to shift or rotate the whole structure. Grouping multiple parts into a single Model can make this even easier, because you can transform the entire model as if it were one object.
Rule: After any major scale or rotation change, always check how the object lines up with its neighbors. Adjust position again if needed to avoid gaps, overlaps, or awkward angles.
By practicing these tools together, you will quickly develop an instinct for how to shape your level. Over time, you will spend less energy thinking about the tools and more time focusing on the design of your game world itself.