Here's a complete list of keyboard shortcuts you can use in Studio! These can also be found in Studio's Help Menu (?) under Keyboard Shortcuts. Differing OS shortcuts will be listed as Mac/Windows.
Note: Editor also supports the following shortcuts for features that overlap with Studio
Tools
Text: T
Anchor: A
Embed Object: E
Hotspot: K
Add Image/Video: D
Pen Tool: P
Rectangle: R
Oval: O
Line: L
Cursor
Selection Tool: V
Hand Pan Tool: H
Hold to Pan: SPACE
Pan to Selection: Select layer, then SPACE
View
Jump to Edges of Canvas: COMMAND/CONTROL + UP/DOWN/LEFT/RIGHT arrow key
Hold to Hide Hotspots: CONTROL + SHIFT
Show Layers Panel: OPT/ALT + 1
Show Pages Panel: OPT/ALT + 2
Open Asset Library: OPT/ALT + 3
Open Media Library: OPT/ALT + 4
Open AI: OPT/ALT + 5
Zoom
Zoom In/Out: COMMAND/CONTROL + +/-
You can also pinch to zoom in/out of the canvas with a trackpad
Zoom to Fit: COMMAND/CONTROL + 0
Reset Zoom to 100%: COMMAND/CONTROL + 1
Selection
Add to Selection: SHIFT or COMMAND/CONTROL
Select All Layers: COMMAND/CONTROL + A
Hold to Select Locked Objects: J
Select All Objects: OPTION/ALT + COMMAND/CONTROL + A
Select Canvas: COMMAND/CONTROL + SHIFT + A
Deselect All: COMMAND/CONTROL + SHIFT + D
Hold to Select Within a Group: COMMAND/CONTROL
Arrange
Move Selected Layer/Object Down: COMMAND/CONTROL + [
Move Selected Layer/Object Up: COMMAND/CONTROL + ]
Move Selected Layer/Object to Bottom: COMMAND/CONTROL + OPTION/ALT + [
Move Selected Layer/Object to Top: COMMAND/CONTROL + OPTION/ALT + ]
Editing
Copy: COMMAND/CONTROL + C
Paste: COMMAND/CONTROL + V
Cut: COMMAND/CONTROL + X
Undo: COMMAND/CONTROL + Z
Redo: COMMAND/CONTROL + Y
Delete: BACKSPACE or DELETE
Hold to Duplicate Selection: OPTION/ALT
Advanced Editing
Copy/Paste Animations: OPTION/ALT + COMMAND/CONTROL + C or V
Make Group: COMMAND/CONTROL + G
Undo Group: SHIFT + COMMAND/ALT + CONTROL + G
Move Selected Object by 1px: UP/DOWN/LEFT/RIGHT arrow key
Move Selected Object by 10px: SHIFT + UP/DOWN/LEFT/RIGHT arrow key
Toggle Object Lock: .
Toggle Object Visibility: ,
Transformation
Resize Text: COMMAND/CONTROL + SHIFT
Lock Movement/Preserve Proportions: SHIFT
Crop: C
Replace Image: COMMAND/CONTROL + D
Rename Layer: OPTION/ALT + R
Guides
Toggle Show Guides: ;
Toggle Guide Mode On/Off: COMMAND/CONTROL + ;
Hold to Show Distance Guides from Selection: OPTION/CONTROL
Toggle Canvas Layout Visibility: OPTION/ALT + L
Toggle Canvas Grid Visibility: COMMAND/CONTROL + SHIFT + '