Rulers & Guides
Rulers and Guides are extremely useful in aligning your layers and elements on the Artboards to make sure they calibrate together perfectly.
To toggle Rulers & Guides, navigate to the hamburger icon on the top left corner of the screen, click
View, then click on
Show and check the boxes next to
Grid & Ruler. Alternatively, you can use the keyboard shortcut
⌘+Shift+’ on Mac for Guides & Ruler respectively and
Ctrl+Shift+’ respectively on Windows.