Should I fill by row or by column?
By column, if the list is sorted and someone will read it as a list. A three-column alphabetical index filled by column puts A to H in the first column, which is what a reader expects. Filled by row, the alphabet zigzags across the page and the reader has to scan horizontally to find anything.
Why are my columns not lining up after I paste?
The aligned output uses space padding, which only works in a monospace font where every character is the same width. In a proportional font such as Arial or Times, an i is narrower than an m and the padding no longer produces straight edges. Either set the pasted block to a monospace font, or use the HTML table output.
Why does a list with emoji look ragged?
Padding is calculated on character count, but an emoji or a CJK character typically renders two monospace cells wide. The tool pads to the same character count and the result is visually uneven. There is no clean fix in plain text; the table output is the right answer for that content.
Can I use a tab separator for pasting into a spreadsheet?
Yes. Choose Tab as the column separator and the aligned output becomes tab-delimited, which is exactly what Excel, Google Sheets, and Numbers expect when you paste multi-column data. Every tab becomes a cell boundary.
What happens to blank lines in my list?
By default they are removed, so an accidental double newline does not create an empty cell. Set Trim blank lines to No if the empty positions are meaningful, for example when you are laying out a list where the gaps line up with something else.