The blt product includes a README, an overveiw manualpage, blt_intro.1 and manual pages for the individual blt widgets:

blt_barchart.1 blt_bell.1 blt_bgexec.1 blt_bitmap.1 blt_busy.1 blt_cutbuffer.1 blt_debug.1 blt_dragdrop.1 blt_graph.1 blt_htext.1 blt_table.1 blt_watch.1 blt_win.1