+- Lighten background shading
+- `!mark col:X` to override the tally mark character for a column
+
+## [0.5.1] - 2024-10-04
+- Fix hover highlight for relabeled columns
+
+## [0.5.0] - 2024-10-04
+- `!label col:new label` to substitute a different label for a column
+- Use Unicode tally marks to coalesce multiple no-colon entries
+ (If you need a font for these, I recommend "BabelStone Han")
+- Don't color the background of cells that contain only '×'s
+
+## [0.4.0] - 2024-10-03
+- Read column threshold from `!col_threshold <N>` in input
+- Allow forcing column layout with `!col <name>` in input
+- `!colsep` to separate `!col` columns
+- `!hide` to hide a column