Is there a way to replace a variable easily?

Yes, to replace a variable, follow these steps:

1. From the IDE menu bar, select the Search > File... option.

   The Search dialog box appears.

   Figure 1. Search Dialog Box
   
   
   
   
2. Specify the search string in the Containing Text field. Specify other search options according to your requirements (refer to the image listed below).
   Figure 2. Search Dialog Box
   
   
   
   
3. Click Replace.

   The Replace Text Matches dialog box appears.

   Figure 3. Replace Text Matches Window
   
   
   
   
4. Click Preview.

The Replace Text Matches window appears (refer to the image listed below). This window gives lets you preview the changes that will be made. This allows you to inspect each proposed change and accept or deny it individually.