I have a few ways, depending on what I’m doing. I only use the SD card and LCD method.
– Draw in inkscape (or sometimes visio), save as DXF, open in ESTLCAM, select paths and export gcode.
– Draw in inkscape, export to PNG, open in Paint.Net, save as BMP, open in LaserEtch, generate gcode.
– Open picture in image2gcode, generate gcode.