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In multi user systems, it's usually much safer not to let users change the contents entirely in case there was a mistake or when it was needed to know what has changed by whom and revert the change if required. Drupal supports content revisioning and there are already some contributed modules that exploit this extremely useful feature like revisioning. However when it comes to content deletion, revision system can no longer be used because when a content is deleted, it gets removed from database entirely including all its revisions.

Entity soft delete module has been developed to address this limitation.

In Drupal there are many different methods to turn long forms into multipage/multistep forms. The most known one is perhaps the great ctools module or even custom solutions using Drupal’s form API. However as you may agree with me none of these solutions are really that easy, specially when it comes to Ajax. Therefore many developers in Drupal community tried or still trying to find an even easier method. What I’m going to introduce to you is yet another magical method :).

In Drupal it's possible to overwrite and extend a theme using sub-themes! So i usually create a custom theme for my site as a sub-Theme of a base theme and try to put all the site specific stuff to that theme instead of the base theme, although it's tricky! and sometimes i have to spend hours finding a workaround for not completely implemented sub themming features but i think it worth it.