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+- Move Visual to the left rail, after Data Layers, Utilities and Authoring, and
+  lead the right column with Context; an open Context or CCTV panel takes the
+  column's full height. A switch in each panel header moves that side's panels
+  over their rail to the screen edge, and the scroll wheel at a screen edge
+  steps through that side's panels (manjunath22466, samehkhamis, #1735).