Welcome to TVPaint Community forums !

would be amazing to be a way to make a quick flip in the draw, draw with the flipped image, and then, when you disable the "quick flip" you return to the original draw but with the changes applied.
is something that is done a lot of times in traditional animation (turn the sheet and see through the light table, to find errors and make the corrections).

even, if the light table has (beside the temporarily shift the image displayed by the lightable out of its pegs) the flip option!

Not sure if this is what you are looking for.
But have you tried the Keyboard shortcut "Preview>Flip Book + Out of Pegs"?
It is discussed more in detail here
http://forum.tvpaint.com/viewtopic.php?f=11&t=7271
Kind Regards
Mads

Thanks! ill chek it!

I have a custom action I created to do just this. In your custom panel, add an action and select add keystroke: then Image: then Flip Horizontally. Now whatever image will flip when you hit this new button you've created. You can flip it back with another press when you're done too.

thanks for the answers.
what im looking for its something like swiftsketcher told! thanks man!

p.d:swiftsketcher, looks like you know about actions. you know any way to turn off all the light tables of all layers with one button? i cant find an action to do that!

Sorry I misunderstood you. must have been tired

You can also flip the view in the menu view>Flip Horizontally keyboard shortcut ' ['