The width of the last row is mm. If you wish to increase the width of the last row, then decrease "Width of first row".
The length of the last plank of one or more rows is less than 100 mm. If you wish to increase the length of the last plank, then decrease "First plank length" for that row.
Red planks means that plank joints are too close to each other. Use "Error correction" settings to try to fix it.
The width of the last row is greather than maximum plank width ( mm). Increase "Width of first row" to try to fix it.