How to enable click enlarge image in Typo3 RTE ?

1) Go to the extension manager and click on the extension “htmlArea RTE” and there check “Enable images in the RTE[enableImages]”.  After that click on “Update” on the bottom.

2) Include the static template “Clickenlarge Rendering (rtehtmlarea) “.

include static template

3) Insert the image in RTE and set on “Click-enlarge” option.