Adding "-" in the middle of a filename using ADD

[cityturbo]

Hi all

I have been struggling trying to insert "-" to separate YMD and HMS using ADD. It seems ADD can only insert at the beginning (prefix) or append at the end (suffix). Am able to rename the filename based on the date & time e.g. 20240130162820.jpg and want to add a hyphen in between i.e. 20240130_162820.jpg but cannot do. Could you guide me how this can be achieved?

Thx a million.

[Admin]

Hi, did you try using At Pos in Add(7) ?

[cityturbo]

I did but it did not work.

[cityturbo]

Just find out if I rename 20240130162820.jpg using Add(7) by inserting "_" at pos, then it works, which means it is done 2-step.

May I know if it can be done in one step? My original filename is A7Cxxxxxxx.jpg, I renamed to 20240130162820.jpg (YMDHMS.jpg). If I tried rename & add "_", it does not work. If you have a suggestion, happy to try out.

Thx, David

[Luuk]

Inside of AutoDate(8), should change the Fmt to "Custom", so then with a "Custom" string like...
%Y%m%d_%H%M%S