The What's This? button is part of this program's help system. Click on the What's This button, then on any widget in the window to get information (like this) on it.
Is cuid de chóras cabhrach an ríomhchláir seo é an cnaipe Cad É Seo?. Cliceáil an cnaipe seo, ansin ar ghiuirléid ar bith san fhuinneog chun eolas (cosúil leis seo) a fháil fúithi.