Excuse me, i’m very new to zbrush. After i load the ImagePlaneX, load in the images and 3D sphere, set up everything, then clicked on Trans button. However, when i selected the 3D object in subtool my object doesn’t turn transparency and my Imageplane turn darkish gray, but when i selected the Imageplane then i can see it, but i can’t sculpt with imagelane highlighting.
This is the images.
Turn ‘Transp’ on and ‘Ghost’ off. It’s the two buttons above ‘Solo’. Go to Preferences > Draw and increase ‘Back Opacity’ to make it more transparent.
Thank you very much. I appreciate it.
No problem! Glad I could help. 
Excuse me. But how come every time i reopen the file, i have to go through all of the set up again? It doesn’t save to the file.ztl?
Save it as a project. It should be completely set up every time you load it.
UI button presses or Preferences adjustments are not saved with the ZTool or Project file, that’s just the way it is, but seriously, it only takes about 5 seconds to make those adjustments. 
hehehe. Thank you all. lol
Excuse me, i have another question sorry. Why is there a bunch of white holes on my object when i move the Sdiv back up to 3, 4 and up? But nothing happen at 1,2. How do i fix that? Thanks.
Well, you obviously did something you shouldn’t have.
How many subtools do you have? You might have duplicated it.
I have an ImageplaneX and the 3d object in subtool.
If i keep both of the imageplaneX and the object with matcap red wax then the holes won’t appear, but if i change to flat color then the holes appear.
OK, it looks like you might have painted or filled with another material. Do the following to reset the material.
I’m sorry, but where is the clear button in “tool”? I don’t see it.
Tool > Masking > Clear
Are they all the same in zbrush version? I have 4R3
Ahh i see it the clear button, thanks
Still happen to me. Nothing change.
I see you have the ‘Rgb’ button on at the top. Did you follow the instructions exactly and turn on ‘Mrgb’ button?
I actually have Mrgb, but when i press command + shift + 3 to take screen shot, that’s why you see rgb, because of shift button.