It can be useful to seek unusually short sentences to see whether your originals have been handled as you want. Because Viewer & Aligner uses full stops, question marks and exclamation marks as sentence-boundary indicators, you will find a string like "Hello! Paul! Come here!" is broken into 3 very short sentences. Depending on your purposes you may wish to consider these as one sentence, e.g. if a translator has translated them as one ("Oi, Paulo, venha cá!") .
This function can also find lower-case lines: where a sentence or paragraph does not start with a capital letter or number -- you will probably want to join it to the one above. This problem is common if the text has been saved as "text only with line breaks" (where an <Enter> comes at the end of each line whether or not it is the end of a paragraph.)
Seeking
Use the Oddities button. Aligner will go to the next possibly problematic sentence or paragraph.
You will see another window showing a diagnosis and a recommendation:
Press OK if you want to accept the recommendation, or another button for a different choice.
Short line setting (default 25 characters) is altered using the Settings button.
There may be several problems:
Here in line 28 of the Portuguese version, the words da Estrela belong with the line above so following the recommendation produced this.
See also: Settings, The technical side..., Finding translation mis-matches, Viewer & Aligner contents