[2022] Favourite Shapes feature?

Originally posted by ☆TheDough: Create a stack of each frame shape you desire, move each stack to your quick bar. Simply use # keys while your building so you can easily switch between them

Pretty much this. Using the shape menu to change the shape only affects the stack of shapes you currently have selected. So you can have multiple shapes readily accessible by having separate stacks.

Do be aware, however, that when shoved into a chest with the quick-move function, any disparately shaped frames WILL stack into one pile and all become the same shape. So if you want to keep them separate and not have to redo it, you'll have to manually move them with drag n drop.