Images
Load an image by clicking the button "Load image". You should see the image on the left panel. You get the size and the name of the image. Most common image files can be opened. Be sure you have the required size.
If you have a single image set tiles to one. The checkbox does not matter for single images. Next select the output format for the conversion. If you selected "1 Bit monochrome", you need to define a level of brightness to decide between 0 and one. 1-Bit images can be inverted too.
When you completed the setup, you can click the "Convert" button. You will see the result on the right panel. If you are satisfied, you can save the converted image as a C-header file. The image name will be prefilled in the save dialog.
A special function is the image strip. You can arrange multiple images with the same size side by size vertical or horizontal. Every tile will be converted separately. The result will be an array of byte arrays containing the tiles.