Hello, i'm here because i can't delete dimensions from RFdimensions and the commands /rftdim safedel isn't in my version (1.16.5) so please help me

Did you try with the TNT block in the dimension editor?

ohh it would have worked but i lost the dimensions tab so do you have any idea to delete them in the mod files ?

Hmm that's harder. I would just leave it then. The 1.16.5 version doesn't have sufficient means to otherwise delete it. Don't use the dimension and ignore it then

i just found a way to do it if i create them the same name and same dimlet it delete them

ah yes that works