I tried to collect must-have items (keyboard shortcuts). The environment is Xcode 11.6.
I often forget complicated shortcuts (customize them!), But I use them a lot and should get used to them quickly.
cmd + F
Search within the currently open file.
cmd + shift + F
Search from all files.
cmd + shift + O
Search for file names and function names. Very convenient!
Remember the following two as a set.
cmd + R
cmd + .
Stop execution (build).
cmd + shift + J
"Which directory hierarchy is the file you are editing?"
cmd + 0
Show / hide the left menu.
cmd + 1~9
Switch the display in the left menu.
Right-click a symbol or hold down cmd and click to see various actions. Right-click → Refactor → Rename is often used.