I want to add a new image to the screen every time a button is clicked while keeping the old images to the right of the new image. How would I code this?
Use CompCreator to create the image in a horizontal arrangement when press button, and set image's index to 1 use Set block.
[Free] CompCreator - create component dynamically - Extensions - MIT App Inventor Community
You could probably also do this using the listview component in horizontal format, adding the image each time with index 1 in a list of elements, then display/refresh the listview