Transferring Chord symbols in Text to Chord symbol

I have a number of Big Band charts that were created by folk in software that did not have a Chord Symbol facility or they did not now how to use it.
Is there a simple/efficient way of moving the test to the Chord Symbols?
Straightforward Copy and past only work one at a time - molto tedious

It likely will not be perfect, but have you thought of generating chords from the notation itself (either all the instruments or just the keyboard/guitar and bass) and then editing the symbols where necessary? It might be the quicker approach.

Derrek, thanks, I have done that a few times - then reviewed the apparent differences to double check so to speak