Copied from @rasat horizontal pager. Make it vertical and have options not easy to find. And transparent. This is an example for others who may be interested.
ColorSet 15 RootTransparent Buffer, Tint #4A516A 50, fg white, bg black
Colorset 16 fg #ffffff, bg #306ea2, hi #ffffff, sh #ffffff, Plain,
Colorset 17 fg #ffffff, bg #028383, hi, sh, Plain, NoShape
## Vertical Pager (4 desk with 8 pages)
DesktopName 0 Main
DesktopName 1 Email
DesktopName 2 Office
DesktopSize "2 1" ## (columns - rows)
Module FvwmPager VdeskPager 0 2 ## (desk number - number of desks)
DestroyModuleConfig VdeskPager: *
*VdeskPager: Geometry 170x260-0+0
*VdeskPager: Rows 3 ## (page rows)
*VdeskPager: Colorset * 15
*VdeskPager: HilightColorset * 17 ## (page active background)
*VdeskPager: BalloonColorset * 10 ## (font color)
*VdeskPager: WindowColorsets 5 16 ## (inactive - active apps)
*VdeskPager: Font "xft:Sans:size=12:antialias=True"
*VdeskPager: WindowBorderWidth 1
*VdeskPager: BalloonStringFormat %c
*VdeskPager: BallonYOffset +2
*VdeskPager: Window3dBorders
*VdeskPager: UseSkipList # hides modules
*VdeskPager: MiniIcons
Style "VdeskPager" !Title, !Handles, Borders, BorderWidth 1, BorderColorset 6, Sticky, WindowListSkip
