Working with topic tree
The contents of a single Dr.Explain project (document) is split into parts — topics. They are organized into a tree — topic tree displayed on the left side of Dr.Explain main window.

Each topic represents a single section of content. When exporting to HTML, each topic is exported as a separate ".htm" file. When exporting to PDF, each topic starts at new page (this behavior an be adjusted in PDF export settings).
There are two special topics in the topic tree:
You can expand and collapse topics in topic tree by using the standard controls, move topics around and change the levels nesting in the tree hierarchy.
Topics can have different statuses and locks. More information about the locking icons and editing topic icons is available in the Lock and status options chapter of this manual.
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Lock icons (for local projects)
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Editing icons (for shared projects)
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Use these buttons to lock topics on the server for editing and then to commit changes to the server and to release the locked topics for other users.
To enable automatic numbering for topics please setup the numbering style in Common settings and then enable numbering for certain topics in Topic properties.