**ShowPlay Reference Manual, Chapter 1 (Introduction): Screenshots**
===== Saving JPEG screenshot images of a ShowPlay paradigm =====

Showplay allows you to grab images of what is on the screen (screenshots) while running a paradigm. There are 3 ways to save screenshots:
  * save an image every X milliseconds (you specify how often X is)
  * save an image whenever the display has changed
  * save an image whenever you press <Control>-W on the keyboard

In order to save screenshots you should do the following:
  * In the Showplay menu, select "Save screen shots" to display a dialog box
  * In the "Setscreenshots" dialog box, specify your options (see below)
  * In the Showplay menu, load and run your Showplay task file
  * Verify that screenshots have been written to JPEG files

The SetScreenShots dialog box lets you specify screenshot parameters. You must enter values for:
  * FilenamePrefix - Saved screenshots will have this name, followed by image number and .jpg
  * FramePixels NX x NY - Width and height of images to be saved (do not exceed screen dimensions)
  * Position X0,Y0 - Screen coordinate for upper-left corner of saved region, or -1 to save center of screen
  * MaxNumImages - The maximum number of screenshots to save (actual number may be less)

By default, images will be taken from the center of the screen only when you press <Control>-W.\\
To save screenshots automatically you can click the options:
  * On Video Change - to save a screenshot whenever the screen changes (text or images)
  * Fixed Interval - to save every Interval milliseconds (you must also specify the interval) 

Note: If FileNamePrefix includes a folder name, the specified folder must already exist.

**See Also:**\\
[[jvs:cigal:showplay:manual:tutorial|ShowPlay Tutorial]], 
[[jvs:cigal:showplay|ShowPlay Home]], 
[[jvs:cigal:showplay:manual|ShowPlay Manual]],
[[jvs:cigal|CIGAL Home]], 
[[jvs:cigal:manual|CIGAL Manual]],