Need some assistance on DPI

[Egg Bramhill]

.... if someone wants to copy my images they can use them on their WEBsite with no problem.

Well basically they can. For a visitor to view your image it must be available to download to the browser.

One thing that is possible is to stop someone right-clicking and selecting Copy Image. Place your image on a page, then directly above it place an equi-sized rectangle it with a 99% transparency and perhaps a watermark. Group both. The image will still look the same but right clicking and selecting Copy Image will copy the transparent image not your treasured image. Not 100% fool-proof but will thwart the majority of visitors.

Print Screen will still contain the watermark. However Right clicking and View Image Info will load all the pages images any of which can be copied. How many visitors know that though?

Preview the attached.