I have 6 separate PDF files. In each of them there is a permanent outline element of 6 plots and the outline of 1 out of 6 buildings and its surroundings (example in the annex). I would like to combine these files into one picture so that I can see all 6 buildings (their outlines, grass etc.) on one projection. Then I would like the combined graphics to be transferred to the google presentation format and so that I could mark each plot of land with markers such as "reserved" and "sold" without using a graphics program. These markers (for example, something like a help button in the bottom right corner of the useme page) would also be proposed by the graphic designer in accordance with the colors sent.