When editing pages with many images it can be difficult to remember the name of every image, especially if the file names aren't very descriptive. HTML-Kit's RichHint feature makes it possible to preview the image at the cursor, without having to track down the images in the preview window.
Depending on how the Firefox / Firebird browser is installed, the auto-detect feature may not be able to find it. This page describes how to add Firefox / Firebird to the list of browsers that can be used to preview the current file.
HTML Tidy and other plugins use the Output window to display HTML code with possible improvements. This FAQ describes a way to preview code in the Output window before copying it to the Editor window.
Many server-side scripts output code optimized for specific browser types and versions. HTML-Kit's Open URL option makes it easier to examine the output of such scripts.
Supporting different screen sizes while maintaining the original look-and-feel envisioned for a site is not always easy. HTML-Kit provides multiple options for quickly changing the size of the preview window to make it easier to test pages at pre-set and custom resolutions.
Although it's possible to preview pages in Internet Explorer and Mozilla/Gecko modes inside HTML-Kit while editing pages, testing the final version of pages in external browser windows is a good practice. This FAQ describes how to preview in browsers installed on the system.
With HTML-Kit's Active Preview feature, there's no need to keep switching back to the preview tab. It can preview the latest version of the current document as it's being updated.