Comment 8 for bug 561857

> you can use _multiple_ grids in the same document

Setting a grid of XYWH 0.5 0.5 1 1 plus a grid of XYWH 0 0 1 1 will be rather useless, no ?
Unless you can easily (un)activate one or the other without going to the prefs menu. And probably the keyboard shortcut (if any) won't work with non-us keyboard [zoom shortcuts don't work with FR or DE keyboards]