object won't selet in edit mode

hello so this is in object mode

but in edit mode is like that

I can’t select at the back of the model they r in grey color. so how to fix that? thanks:o

Post the blend file.

Either there is something in your modifier stack causing it or it is just another object.

hello thx for replying this is in edit mode without pressing Z

the back of the object disappear

here is the modifier setting do u think this is the problem? thx