Sometimes it's hard to figure out the exact regular expression to write that will get the job done. With the Regex Evaluator tool window, SlickEdit provides a convenient method for creating, saving, and re-using tests of regular expressions.
To display the window, from the main menu, click Tools > Regex Evaluator. Enter some sample text in the top area. Select the type of regular expression syntax to use, then enter your expression pattern in the bottom field. Matching patterns in the test case are indicated with a wavy underline. Groups (tagged expressions) are indicated with a boxed yellow highlight.