backdrop missing

hello
am following a tutorial, but my backdrop is missing, although thicked :rolleyes:
can somebody help me out??

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You need to add a Viewer node. The backdrop that is displayed is what the last selected viewer node is seeing.
Otherwise how would you know what part of a node tree to show as the backdrop ?

sorry but i have no clue, am completely new to this, always tried to avoid this node stuff puzzles;)
but i have to face them, i admit…
added a Viewer node , but now i have this cross coming up, Looks i make a bad start with node Editor
sorry for my complete noobness

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Looking at your render layers node, it looks like you haven’t yet rendered your scene so the compositor has got no information to process

ok thanks, I think i have to restart from Zero with this compositor… sorry to bother