After you have opened a screen in the Screen editor, right-clicked a box on it and chose Properties in the pop-up menu, the Screen object properties window opens. On the Box tab in that window, you specify translations of captions of this particular box. You cannot set foreground or background colours though: boxes are always transparent.
A box is for visually grouping screen elements and is typically used on detail and zoom screens. Screen elements that are placed inside a box become part of it but the frame is for cosmetic purposes only.

Click here for information on how to edit screen object properties in general. And click here to read about how to manage boxes in the Screen editor.

On the current tab you'll find the following settings:

Captions

You may provide a caption of the frame in one or as many languages as you wish to make available to users of this application. The caption will be displayed in the screen in the top left corner of this box.

Foreground & Background colour

This functionality has not been implemented for Axiell Collections.

Font type

This functionality has not been implemented for Axiell Collections.

Legacy only

Mark the Legacy only checkbox (available from Designer 7.3) to prevent this box from showing up when Axiell Collections displays the current screen. (For display in a legacy Adlib application it doesn't matter whether you mark the checkbox or not.) This allows you to present the same screen with a more or less limited set of (fields and) boxes in Axiell Collections.

See the Excluding screen fields from Axiell Collections applications topic in the Designer 7.3 release notes for more information about Axiell Collections and its relation to the now obsolete Adlib for Windows.

Edit link group on demand

Mark this checkbox to turn the box into a screen table grid view. The contents of any linked fields in a table grid will load much faster than normal box contents. This is especially relevant for linked fields which often have many (dozens or hundreds of) occurrences, like the Parts field in archive catalogue records for example. A screen table grid works best if the box contains but a single field group. Consider moving fields which are not part of this (often repeated) field group to another box. If the box contains just a single field, assign it a field group name in the .inf too, otherwise the table grid won't display.

See the Screen table views for faster performance topic in the Designer 7.5 release notes for more information about this functionality.