Couple shots of fluxbox -
One thing fluxbox is missing out of the box is a pager - fbpager and obpager are still in the repos, but no longer developed, and have some limits aesthetically. Since Vsido uses tint2 by default, it's easy enough to configure tint2 to display multiple desktops and get pager functionality that way. But, if you don't want to run a 3rd party application, limited pager capability can be quickly set up by configuring the fluxbox Iconbar.
By default, the Iconbar is enabled and set to show all the windows on the active workspace. A quick look at the configuration options in the menu (screenshot) shows there are several other options available. Note that Icons refers to iconified windows, not the mini icon associated with an application. If you do not want to display the mini icons with the window in the iconbar, clear the "show pictures" option.
None - don't display the iconbar
Icons - only iconified windows, all workspaces
NoIcons - only open windows, all workspaces
WorkspaceIcons - iconified windows on active workspace
WorkspaceNoIcons - open windows on active workspace
Workspace - Open and iconified windows on active workspace
All Windows - Open and Iconified windows, all workspaces
Workspace is the default.
Changing to All Windows will display all the open and iconified windows on all desktops (file manager and gimp are open on Workspace 2 in the screenshot) and clicking on the application in the iconbar has two potential outcomes: If the window is open, you will switch to the workspace and the application window will be raised and focused. If the application window is iconified, it will be moved to the current workspace, raised and capture focus.
Unfortunately, unlike tint2 pager mode, only the current workspace is numbered on the fluxbox toolbar, so visually the user cannot tell which workspace the window actually occupies.