Since upgrading to Fedora 24, my calc spreadsheets do not have the arrows at either end of the horizontal and vertical scrollbars. They were also missing in Fedora 23, but I found a hack on the web modifying the gtk-2.0/gtkrc file. My current LO version is 126.96.36.199-1.fc24. I found a previous question on Ask LO: “How do I enable scrollbar arrows in LO under Linux”, but that question went unanswered. A comment to that question indicated that LO was in transition to gtk-3.0, and that may be the reason why no answers were provided. Version 188.8.131.52 is apparently using gtk-3.0, but the only fix I could find on the web involved enabling the arrows via a .config/gtk-3.0/gtk.css file; this had no effect. I have tried changing the theme from Adwaita to other themes (which appear to have scrollbar arrows enabled) but this also has no effect.