If you have ever wanted to capture a screen of a display and save it to and SD car, this free library will let you add useful functions like print screen and draw BMP to your Teensy projects. It requires a Teensy MCU and a display that uses the powerful ILI9341_t3 driver. Implementation is simple, include the library, and make one call to save a screen shot to and SD card, and one call to recall the image and display on the screen. Created images are 24-bit.

Link to code:

YouTube video of implementation