The Edit menu has an Undo feature; along with "Unselect all", which will de-select all changes. Furthermore, for changes to take effect one already has to click the large checkmark "Apply" button in the toolbar.
I'm closing this bug as it seems all of the points in the description are covered. Thanks for filing a bug and helping to make Ubuntu better! Please don't hesitate to report any further bugs you may find. ** Changed in: synaptic (Ubuntu) Status: New => Opinion -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/847864 Title: User can corrupt their system by wrong synaptic usage,so I suggest synaptic should provide 2 things on the GUI To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/synaptic/+bug/847864/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs