TRichView.com

You still need to register it RegisterClass(TGifImage)

This problem happens because you have two TGifImage classes - from RxGif.pas and from GifImage.pas.
When you insert TGifImage, you insert GifImage.TGifImage, because GifImage is included in "uses" of your unit. But when pasting, RxGif.TGifImage is inserted (because it is registered with ...

Exe file will be rejected by the mail server (even in zip)

Actually, undo type (specified in BeginUndoGroup) is not used by TRichView itself. It can be read by UndoAction/RedoAction methods, and you can display its caption in undo/redo menu, like the demo Demos\Delphi\Editors\Editor 1\

RVE.TopLevelEditor.BeginUndoGroup(rvutInsert);
RVE.TopLevelEditor.SetUndoGroupMode(True);
try
if RVE.InsertPicture(...) then begin
RVE.SetCurrentItemExtraIntProperty(rvepImageHeight, ...);
RVE.SetCurrentItemExtraIntProperty(rvepImageWidth, ...);
RVE.SetCurrentItemExtraStrProperty(rvespAlt ...

Ok, you can download it here:
http://www.trichview.com/resources/html ... import.zip
Before installing, open rvHtmlViewImport, find and remove {$DEFINE RVFULL}
See also installation instructions in ReadMe.txt

Please send me example reproducing the problem

Use rve.BeginUpdate ... rve.EndUpdate

I just uploaded (for registered users) a class for reading HTML from THTMLViewer ( http://www.pbear.com )

In addition to using this TGifImage, you must also set RichViewEdit.AnimationMode = rvaniOnFormat, and include RVGifAnimate.pas in your project.

TRichView is already updated, make sure that you use version 10.2.
If you already installed this version, then delete files of the older TRichView version, because it looks like Delphi tries to compile ScaleRichView with the older version of TRichView.

Besides, it looks like your version of ...

See here: http://www.trichview.com/forums/viewtopic.php?t=89 (the 2nd and 3rd posts)

I believe it is because saving to database causes reloading (because the document is reloaded if the database content is changed), and the selection is lost. You can save the selection before and restore it after calling DuenneTabLinien.

Sorry, what is unrecognizable codes?
Please send me a simple project reproducing this problem.

ScaleRichView allows printing in another page format (with scaling) using TSRVPrint component. There is an example of using this component to print posters, but it may be too complicated for this simple task.
Ilya will make a simpler example soon.