That you can insert tabulation character by pressing Ctrl+TAB?
That you can quickly insert default tags by clicking a button on the toolbar with right mouse button? Default tags are marked with "*".
That you can send your own snippets for HTML Constructor? Send them to a-i@bk.ru!
That it is strongly recommended to turn on the "Autosave every minute" function in Preferences dialog?
That you can automatically replace all entries of a word with the "Edit --> Find&&Replace --> Replace All" function?
That you can edit your HTML Template (press Ctrl+H to see it) either by selecting "File --> HTML Utilities --> emplate.html" from menu or by editing the "template.html" file in the program folder?
That you can quickly insert <br> tag by pressing Ctrl+Enter?
That you can quickly transform plain-text web address into the <a> tag by selecting this address and pressing F5?
That in order to display tags in your HTML page you will have to replace left bracket "<" with &&lt;. Simply select the text that contains tags to be shown on the page and press F7.
That it's very simple to start a new page? Just click "Tools --> HTML Starter" or "Tools --> HTML Color", and click "Wizard" button. 
That if you can't see a part of the path in the AddImage dialog, simply point to the textbox displaying it and wait a second. A tooltip will appear showing to you the full path and file name of the selected picture.
That it is very simple to get the latest version of HTML Utilities? Press F1 and click "HTML Editor".
That you can append a file to the current text? Select File --> Merge.
That in most dialogs you can press Enter and Escape instead of clicking the OK and Cancel buttons, respectively.
That you can quickly load your favorite files (File --> Favorites) by pressing Ctrl+Alt+Gray 0...9. 
That you can open new HTML Editor window by pressing Ctrl+Alt+N?
That in "Preferences" dialog you can set not only "Lucida" and "Courier New" fonts? Simply type in the name of your favorite font, press OK and restart the program.
That you can jump to necessary string if you know its number? For example, if you are debugging a JavaScript and browser tells you the number of erroneous line.
That you can use command line parameters in Editor and Optimizer? Use "heditor.exe file_name" to open the necessary file, and "hoptmzr.exe file_name" to reduce size of an HTML or CSS file.
That if you optimized a file with Optimizer and forgot to make a backup, but you need to make it readable again, just open it in Internet Explorer, select File --> Save as... and you'll get a quite readable file (but of course not like an original).