Issue
Sequence alignments appear off-center and you cannot precisely drag the ends(black bars) of the trimming window. An off-center alignment make it difficult to accurately compare sequences.
Environment
Molecular biology
Cause
The browser window is left open too long and does not properly update edits within the alignment tool.
Resolution steps
First, try refreshing the browser window. If that does not resolve the issue, close or quit the browser window, clear cache and cookies, then reopen Benchling.