This is a setting that will considerably reduce the size of a Lotus Notes message by compressing the images pasted into a document.
* * *
http://www-01.ibm.com/support/docview.wss?rs=899&uid=swg21136853
SPR# TOHA673FH2 - Setting the notes.ini variable, "OptimizeImagePasteSize=1", converts all bitmaps and metafiles to .gif files when pasted into a document. Without this setting, bitmaps and metafiles take up a large amount of space causing the size of documents to be larger then necessary.
* * *
http://www.ibm.com/developerworks/lotus/documentation/notes-ini/ktoo.html#O
In releases prior to 8.5, there is no UI equivalent. Beginning with release 8.5, you can set a Basic Notes Client Configuration preference instead of using a notes.ini setting. Under Additional options, check Compress images pasted into documents.