**Allows to remove all cells smaller than the chosen threshold.** The cell size is its area in pixels (number of pixels inside the cell). When this button is clicked, all frames will be treated.
## Cell inside another: merge
**Merge all cell fully included in another one into it.**
One recurrent segmentation error can be a large cell wrongly split in two cells, with one (false split) inside the other (correct one). This kind of error occurs when there is a large bright spot inside a cell, as for example into SOP (Sensory Organ Precursor) cells.