Moodle can be used on different devices, at different times, in different places. Therefore, there are factors that we need to be aware of when designing courses and themes.

Therefore, hereafter in this chapter, there are several aspects and concepts that we need to look into in more detail in order to understand what we need to take into account when we design our courses and build our themes.

Devices change in many ways, not only in size but also in the way they display our Moodle course. Moodle courses can be used on anything from a tiny device that fits into the palm of a hand to a huge IWB or smart TV, and plenty of other devices in between. Therefore, such differences have to be taken into account when choosing images, text, and other components of our course.

We are going to deal with sizing screen resolution, calculating the aspect ratio, types of images such as sharp and soft, and crisp and sharp text. Finally, but importantly, the anti-aliasing method is explained.