Chord/Fretboard diagram features

Here are a few functions regarding the chord diagrams which are very important for me and I would be very grateful for their implementation:

1. you can make several dots on a string, but not an empty string plus one dot on a fret. At the moment you have to make two separate diagrams, one with the empty strings you want to have and another with normal points, and then overlay them. So it would be great if you could make dots on empty strings and dots on frets simultaneously.

2. you now have different dot symbols (cross, triangle, square) to choose from, but you can't put 2 symbols on the same spot. I would like 2 symbols to be in exactly the same place, for example a cross on a dot, or a triangle on a square.

3. it would be great if you had white, empty dots besides black dots.

4. last but not least, I would like you to be able to put letters in the dots, in the same way that you can put note names in the note heads. 1 to 3 characters would be enough. I want to be able to have characters like R for root, b3, #11, etc. in a chord diagram.

Thanks a lot.

best regards,

Panzerschwein