Masking

https://www.youtube.com/watch?v=MYnML9PCr9Q

Clipping Mask

-creating clip mask
-filling in background of clip mask
-exiting out of clip mask

Draw Inside

-creating things within clipped mask

Opacity Mask

-using the transparency panel to create dynamic color masks



CTRL+ALT+7 - Find mask

Clipping Mask

Clipping Mask
Object>Clipping Mask>Make
Object>Clipping>Release


Clipping Masks are essential when it comes to confining things into certain outlines.

Hotkey:
ctrl+7 - clipping mask

crop marks for clipping masks
Select crop marks to cut parts of design either making it essential for UI icons or templates for printing.