How to generate one own cts annotation file?

[Crazzy-Rabbit]

Hi,
In LDSC-SEG part, we can use the files which provided as such "Franke.1.21.annot.gz" "Franke.1.21.l2.ldscore.gz" "Franke.1.21.l2.M_5_50" to run --h2-cts, it's very convenient. But how can I generate such annotation file with my own data ? Because, obviously, some specific tissue is not contained in this annotation set.

sincerely,
lulu