Tellraw Art Maker
The tellraw art maker may be the most useful in mapmaking. The interface may seem scary, but you can get used to it fairly quick. First things first, let's create a rawtext artwork. To begin let's generate a grid. Put the size of the grid in the "Enter Grid Size" field and press "Generate Grid". Take note that the Grid Size can only be between 4 and 8. Float values work, but do not use them.
Drawing
Once the grid is generated, you can press a color and begin drawing on the grid. Paint a picture! I drew a smiley face! (See Image 5)
Converting to Minecraft
Once finished, you can press "Convert To MC" to convert into code Minecraft can understand. Let's also tick "Tellraw Mode", as we want to use this in a tellraw command. Once the output is computed, let's press the Copy Button to copy that to clipboard. Then, let's head into Minecraft, and then do /tellraw @a (paste what you copied). It should look something like Image 6. Executing this Command Block will show the following in chat. (Image 7)
Signs
The tellraw art maker can also turn signs into colorful banners, which can be used to make LARGE SIGNS! Creating a sign is the same process as creating a rawtext art. Just press "Sign" when entering a grid size, which ranges from 5 to 9. Once copied, you can paste it onto a sign. For examples of things you can do with the sign function, click here.
Other Functions
To create a grid with a color already predetermined, just press a color and THEN create a grid.