Construct a table for your images and text (similar to a table in word) but give dimensions as a percentage. If, for example, it is a 1 column, 3 row table the set the horizontal dimension to 100%. This is known as a "relative width" This will make the table resize to fit the dimensions of the viewers screen.
Of course, the difficulty of doing this depends on what software, if any, you are using.
You may find this a help: click here
or this for info and tools: click here