A function can be set to "ignore" or "remember" picked objects.
When working with just one object type but many instances, just pick the proper instances and call the function set to "and remember picked objects"
example:
+ Function: On function "props"
-> myText: Set text to myObject.X
+ System: For each myObject
-> Function: Call function "props" (and Remember picked objects)
When working with different objects but the same object type (e.g. several different sprites) put them in a family.
example (sprites put into family Blue):
+ Function: On function "props"
-> myText: Set text to Blue.X
+ System: For each Blue
-> Function: Call function "props" (and Remember picked objects)