You can open this form directly, by pressing Layouter.BitmapAndLinks icon 
then select resolve links tab.
Within this tab, you can see all of externally linked bitmaps which are ready to be resolved. That means that every bitmap in this list is up to date and link of the source file is valid. This searching is limited to the chosen range of pages. On the right side is the text box displaying information about the chosen file from the list.
You can choose a desired range (current page, pages FROM - TO, all) in the Range frame placed at the bottom.
Read more about pros and cons of using externally linked bitmaps and links resolving.
Usage of buttons:
refresh list
This button refreshes the list of files for active document, range and scope.
show selected item on the workspace
This button display the relevant page and makes bitmap selected for the chosen item. You can use it to quickly localize on the stage items that has been displayed in the list.
resolve the link of selected item and embed bitmap in document
This button resolves link for selected item on the list. If you press it then externally linked bitmap will be replaced by the original high resolution image.
resolve links of all items in chosen range and embed bitmaps in document
This button resolves link for all items on the list. All of externally linked bitmap in chosen range will be replaced by the original high resolution image. Use it for batch resolving of bitmaps before producing final document ready for print or you wish to make high quality preview of chosen range of pages.
Keep aspect ratio option
If this checkbox is ticked then resolved bitmaps will get the aspect ratio from modified source file. Otherwise, resolved bitmaps will remains previous aspect ratio, which may results in disproportion if the source file had been changed aspect ratio.This settings matters only if the source bitmaps had being changed while working with this tab.
export list of all bitmaps
Press this button to export current list of bitmaps and related information to the text file. The file will be placed in the folder where the active document file exists.
RELATED SHORTCUT ICONS
resolve link of the selected external bitmap and embed it in the document
macro: Layouter.resolveLink
This macro resolves a link for the selected bitmap on the stage and embeds it in the document.