Sliding window tabs, a quintessential BeOS feature, are now supported in Haiku, thanks to François "mmu_man" Revol. His check-in allows users of Haiku to slide window tabs just as they can on BeOS R5.

Sliding tabs are often misunderstood or not even noticed as a feature by users of BeOS, but they enable faster switching between windows if they are arranged like tabs on folder files on overlapping windows, or similar situations. Majorly under-used, the feature (hold shift, click a tab and move it) is appreciated mainly by longer-term users of the OS. Notably, it is missing from Dano-based systems such as Dano or ZETA, due to changes in the window theming system having left it unimplemented.