Problem Opening iMac Finder Window in PSE11

i using imac, el capitan pse11. when try open finder window choose photo or art work work on, window opens menu bar hidden , not scroll down allow me view icons or options choose other folders. has experienced problem? if so, can solution please?

 

message edited by: brian brown. placed space missing between 2 sentences

can not click green button , move window about?

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