Ribbons - Alignment
The Alignment ribbon appears when you are working on an
To learn more:

Create Synchro Link
Create Cross Link
Mark As Insertion: Marks a segment as an insertion: tells memoQ that the segment has no counterpart in the other document. Shortcut key: Ctrl+I.
Remove Link or Insertion: Remove a link between two segments. Also removes insertion marks. Shortcut key: Ctrl+R.

Appears only when you work on monolingual review: After you import a reviewed translation of a document, you need to align the reviewed translation with the "original" translation stored in memoQ.
Create Review Link: Links two segments. This tells memoQ that the segment on the right is the reviewed version of the segment on the left. Review links show up as blue lines like synchro links. Shortcut key: Ctrl+L.

This section deals with links that were created automatically by memoQ. These are the green links.
Remove All Auto Links: Removes all links that were automatically created by memoQ.

Run Aligner: Runs automatic alignment again on the current document pair. Does not touch manual links (synchro links and cross links) or insertion marks. Automatic alignment can start at the current segment or can be run on the entire document pair. Brings up the Alignment options window. Shortcut key: Ctrl+Shift+R.

Quick Add Term: Works only if text is selected in the source cell and

Split Segment
Join Segments: Joins two or more segments into one. If you do not select the segments, memoQ will join the current segment with the next. If there is text in the target cells, they are also joined. Shortcut key: Ctrl+J.