Description
When you select the "Find/Replace" function in STEP 7, the dialog cannot be displayed in the LAD/STL/FBD editor. If you have addressed a second monitor with you PC and you have added a second monitor to your desktop, the "Find/Replace" dialog is probably not located in the visible area. The remedy is described in the table below.
 

No.	Procedure
1	You open the "Tools > Customize..." dialog and select the "General" tab. There you disable the "Save window arrangement on closing".
2	Confirm with OK and execute the menu command "Edit > Find/Replace..." again.
3	If this dialog is still not in the visible area, close the LAD/STL/FBD editor and the SIMATIC Manager.
4	In the Control Panel you open the "Display Properties" dialog and select the "Settings" tab.
5	For the second monitor you disable the following function as shown in Fig. 01: "Extend my Windows desktop onto this monitor". Fig. 01
6	Then click the "Apply" button, followed by "OK" to confirm.
7	Restart your computer and the "Find/Replace" dialog should be visible again in the LAD/STL/FBD editor.