I know how to do that for the current sheet, either with a preview; or with Format->Page->Sheet->Scale. Though when I mark my 82 sheets, this is applied to a single one sheet only. So I'd have to adjust 82 times? I'd expect the resize to apply to all marked sheets; just like 'print' applies to all marked sheets. It might be considered RFE, I consider it a bug, since I expect the command to be applied to 'all marked', contrary to 'active' when none is marked.
There is an option to have the scale applied for all sheet or only for the selected sheets. Menu/Tools/Options/LibreOffice calc/View - Zoom - Synchronize sheets. With option unmarked I can change the scale only for selected sheets at once. Win10x64 Version: 5.3.0.0.alpha0+ Build ID: ea9a90d83d92076d41abfd31a1fd3a5d84b6ba92 CPU Threads: 4; OS Version: Windows 6.19; UI Render: GL; TinderBox: Win-x86@39, Branch:master, Time: 2016-08-26_06:19:43 Locale: es-ES (es_ES); Calc: CL IMO not bug, please if you are not agree reopen it.