How to add my own new graphics to the internal PSE library ?

Hi everyone,

I presently use the trial full version of PSE 15.

I spent hours on forum etc..with no solution or even clues whether what i wish to do is possible or not.

If any expert could help here !

I would like to add my own new graphics to the internal library within PSE to easily access them from the side panel.

1 - How to add or modify "section" names of the preset section of the graphics ?

2 - How to import my own graphics in this pannel ?

3 - Additionnaly i'd like to set my own keyword for those graphics ?

Many thanks to those who will take time to help.