Chord Charts

I’m wanting to add my own fingering charts and would like to know what apps others use to generate the png files.
I’ve come across a few on the web but the file needs modifying, mainly to get the transparent background. Not a major issue but the definition of the diagram often gets lost.

Hi Roy
I use Serif DrawPlus X4 - quite old but great for producing diagrams with transparent backgrounds.It might even be available free these days!

Can’t get Serif 4 all their Serif product have been archived (as you said old). I did manage to get a copy of the free version of Serif. This works well.