Comment 4 for bug 793420

This can be confirmed.

In PcbNew there is a menu "Dimensions" with the sub menues
Grid
Texts And Drawings
Pads
Pad Mask Clearance
Diffrential Pairs
Save

Kicad uses a project file .pro and the pcbnew uses .kicad_pcb

B)
All the values in Grid/Pads/Pad Mask Clearance/Differental Paris
are saved in the .pro file and does not affect the .kicad_pcb

A)
All the values in "Texts And Drawings" is on the other hand
saved in the .kicad_pcb file.

This mean that any changes in B) must be followed by using the "Save" menu
choice, however using Save will not save any changes made in B)

But any changes made in B) will not "modify" pcbnew and therefore
these changes will be lost if the pcb is not modified in any other wy
like adding a track.

The follwing patch will "modify" the pcb if B) is modified
so the user can either save the changes in normal "pcb way"
or, at least, get a notification of unsaved data if exiting pcbnew without saving

 bzr push lp:~stol/kicad/bug793420
Using default stacking branch /+branch-id/324654 at chroot-67822224:///~stol/kicad/
Created new stacked branch referring to /+branch-id/324654.