I have a way of organising my macros by prefixes. a: prefix means a macro is used by me. t: prefix means I am testing it, and it is still not ready to be used or just that I don't need it right now.
Here is how it looks :
This helps me organise my macros and keep me sane and distinguish them. I also usually search and filter by my prefix however this doesn't work in km. It gives no results when I think it should.
Unfortunately I think you are using a character that is part of the search syntax: the colon :
To search for characters that are part of the macro name, you need to use the name: (or just n:) qualifier, like this: n:a:
t:f2 shows you all your macros that are triggered by F2 t:f shows you all macros that have any F(unction)-key, or any key combo involving the letter-F key, or a typed string containing f as trigger (and also the ones with a Folder trigger!) t: shows you all macros that have a trigger (any trigger) ← This is the search you were actually (and unknowingly) doing.