For proper marking of cached content you need to have installed not only JotCache plugin but also the JotCache component. For page marking to put it in the operation it is necessary :
With Set Mark button here it is sent marking cookie to your browser and then you can see marked page title (with string
[MARK] in title begin).
When the page is comming from cache page title has string
[CACHED] in title begin :
For cached page are excluded module positions in each response refreshed and they are marked with dashed red outline :
The marking can be used also for fast selection of pages which is necessary to remove from the cache. The recommended selection practice is following :
Selected files can be deleted as described in management view section.
Especially when checking module template position exclusion can be helpfull debug feature of JotCache (enable in Options parameter Show file hash) which allows fast allocate specific cached page and to display in source form :
In the source code of the cached page can be searched (with browser find function) for presence of exclusion jot tags, etc. For fast overview is recognized number of position exclusions shown in text over the textbox.