TRichView.com

1. As for RTF import:
External images are supported. These images are inserted when reading 'INCLUDEPICTURE' or 'IMPORT' RTF fields.
If the referred picture is local, it is loaded automatically. If it is on a remote location, you need to use OnImportPicture event (but, if you use RichViewActions ...

TRichView need a parent form for formatting. The form may be hidden.
The alternative is using TRVReportHelper component. It contains invisible TRichView inside (accessible as RichView property) that does not need a parent form. TRVReportHelper must be formatted using RVReportHelper.Init method ...

If you want to find the location of the control, you can use this function:

procedure FindControlLocation(var RVData: TCustomRVData; out ItemNo: Integer);
var
table: TRVTableItemInfo;
r,c: Integer;
begin
ItemNo := RVData.FindControlItemNo(TControl(Sender));
if ItemNo<0 then
begin
RVData ...

The simplest solution is selecting the control on clicking on it: process OnMouseDown of controls, and call RichViewEdit.SelectControl() in it.
See the example in viewtopic.php?t=157 (how to resize and drag&drop controls in the editor).

AutoComplete property for these combo boxes is False by default, intentionally.
Each time when autocomplete works, the font is applied, adding a new item to RVStyle.TextStyles (if there is no existing items with these properties).
While these items will be removed after the next call of ...

The demo uses a workaround,

const
WM_DESELECTCOMBO = WM_USER + 1;

In the form's interface section:

procedure WMDeselectCombo(var Msg: TMessage); message WM_DESELECTCOMBO;
procedure DeselectComboBoxes;

Implementation:

procedure TForm3.DeselectComboBoxes;
begin
cmbFontSize.SelLength := 0 ...

TCustomRichViewEdit has a method for processing Backspace:
procedure OnBackSpacePress(Ctrl: Boolean);
But this method is protected.
You can try to call it in this way:

type
TCustomRichViewEditHack = class (TCustomRichViewEdit)
end;
...
TCustomRichViewEditHack(RichViewEdit1.TopLevelEditor ...

The correct event is OnJump
The help topic has an example code how to get a target of the clicked link (assuming that this target is stored in the item's tag).

PS: there is no OnRVHyperlink event. There is OnReadHyperlink event that occurs when reading hyperlinks from RTF, DocX, HTML, or Markdown ...

Sorry, not supported yet.

In VCL version, you can use SendMessage:

SendMessage(RichViewEdit1.TopLevelEditor.Handle, WM_KEYDOWN, VK_BACK, 0)

Sorry, what's "insert key"?

Not all table properties can be saved to RTF.
Use SaveRVFToStream and LoadRVFToStream.

That topic is on the protected forum, accessible for registered TRichView users.

In TRichView, a bookmark" does not have lengths, it marks a single place in a document.
I plan to implement lengths for bookmarks (most probably, by grouping them in pairs of starting and ending marks), but not in the near future, sorry.

The same for changes discussed in the referred topic.

1. Sorry, but I cannot reproduce this problem with the mouse cursor.
I checked the demo in TRichView\Demos\Editors\Editor 1\

It has Screen.Cursor := crHourglass before loading, and Screen.Cursor := crDefault; after.
(the call of RichViewEdit1.Format is after restoring the cursor; it's not good, you ...