BMP Export Dialog Box
The BMP (Windows Bitmap) export bitmap dialog box is opened by selecting BMP as the exported file format from the Export dialog box. It allows the setting of the size/resolution of the exported bitmap, the area to be exported and the number of colors in the bitmap. For details of how to create a BMP file, see Creating BMP files.
Bitmap Options - this tab is blank for BMP format
Export/Apply Button (see Note)
This button reads Apply when setting options in the Name Gallery (because you are setting options prior to Exporting a sliced image). Otherwise it reads Export.