New Toggle Grayscale command (CmdToggleGrayscale, command palette) renders document pages in grayscale. The choice is remembered in the FixedPageUI.Grayscale setting (#6207).

New Start Reading From Cursor Position command (CmdReadAloudFromCursorPosition) starts Read Aloud at the text under the mouse cursor. It has no default shortcut, so you can bind your own; from the command palette it uses where the mouse was before the palette opened (discussion #6213). The Read Aloud toggle command is now named CmdToggleReadAloud.

The borderwidth argument of the CmdCreateAnnot* commands now also works for line, polyline, polygon, square and circle annotations, not only free text and ink (discussion #6208).

Choosing an annotation tool such as Ink, Line or Square from the command palette now starts the same on-page placement mode as the Edit PDF toolbar, instead of creating a default annotation right away.

A toolbar drop-down opened with a right-click now stays open until you press Esc or click the page.