## Event Type
Picture File

The Picture File event type lets you select and display picture files. You can select a single file or have the event pick a file from a stimulus list. You can also have the visual stimulus displayed at different locations, in random or sequential order. The supported file formats are:

- Mac OS: JPEG, GIF, PNG, PICT, BMP, TIFF, and any file format supported by QuickTime.

- Windows: JPEG, GIF, PNG, BMP, and TIFF.

| The Event Editor can be resized. This can come in handy if you want to see a larger thumbnail view of your stimulus.

There are two main views in the Picture File event type: Settings and File Info. The File Info view provides information about the selected file. If the event uses a stimulus list instead of a single file, no information is displayed.

In the Settings view:

- Click on the Use popup menu to select whether this event uses a single file or a stimulus list. If you select a single file, a thumbnail of the picture will be displayed. You can resize the Event Editor to see a larger thumbnail.

- Click on the Preview button to see how the picture will be shown to participants. The Preview button is not available if you use a stimulus list or if a picture file has not been selected.

- Click on the Show grid checkbox to have SuperLab display a grid the next time you click on Preview. The grid can be useful when positioning a visual stimulus. The grid lines are 50 pixels apart and are displayed only when previewing from within the Event Editor; they are not shown when running an experiment.

- Click on the Settings button have another dialog appear and set the various options that are available; more about that below.

### Picture Settings

When you click on the Settings button, another dialog appears that provides a range of options for controlling the position and size of the picture as well as other display options:

The Position tab lets you determine the picture’s position. You can specify either a fixed location by providing a specific pixel position or a variable location by using the Trial Variables feature. A variable location can be sequential or random.

You can use the Size tab to change the picture file’s dimensions. SuperLab uses an anti-aliasing technique to minimize distortion and provide the best possible picture quality when a picture file is resized.

The Presentation Options tab provides additional options for doing things like showing multiple pictures on the screen, either in sequence or simultaneously.

### See Also

- Tutorial

- Trial Variables

- Stimulus Lists

- Presenting Two or More Visual Stimuli at the Same Time

- Moving Experiments Between Macs and PCs