Quick search in the TOC
There is a new incremental search feature in the TOC. When anything in the TOC is selected, typing a character jumps to the first character in the TOC starting with that character. Typing two characters quickly jumps to the first entry starting with those two characters. Pressing the HOME key jumps back to the top of the TOC.
Bring the current topic entry into view
•Double-clicking on the current topic entry in the TOC centers it in the TOC pane.
•Double-clicking on the header of the Project Explorer centers the selected entry in the TOC pane.
•Switching topic tabs brings the current topic entry into view in the TOC.
Insert Picture
•The Insert Picture dialog has been completely rebuilt with a number of new options.
•The Insert Image dropdown menu now includes the folders from your project search path so that you can insert images from there directly.

View and edit all topics with a set status
The Report Tool can now list all topics by status and you can then edit them directly by clicking on the topic links in the report. This is much more efficient than searching for them manually in the TOC:

Repeat Find with F3
You can now repeat the last find function with F3 (customizable), as long as the Find & Replace dialog remains open. The dialog is not modal, so you can continue editing even when it is open.
Important: This will only work if you haven't assigned F3 to another function, of course.
Half-point font sizes
You can now select half point sizes (e.g. 10.5pt) for fonts in the editor. When a project using half-point sizes is edited in an older version they will be truncated to the whole point size without rounding.
Copying styled text between projects
When you copy text and paragraphs formatted with styles between projects and the styles have the same names but different settings the style of the target project is now used immediately. In earlier versions this required a topic reload to show the formatting of the target style version.
Copying linked snippets
When you copy a linked snippet from one topic to another the target snippet is now displayed immediately. In the past this showed an annoying incorrect error message and only displayed the snippet after a topic reload.
Paste as Markdown
A new Paste as Markdown option as been added to the Paste menu. This converts copied Markdown text to Help+Manual XML when you paste it from the clipboard. It assumes that the clipboard actually contains Markdown text, of course. If you use this frequently you can assign a custom keyboard shortcut to this function in View > Program Options > Shortcuts.
Syntax Highlighter for Program Code
•Several irrelevant highlighter formats have been removed
•New option in the configuration dialog for including line numbers in the formatted result
•New example preview in the configuration window