Img Tab

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Img Tab is the image browser of APT. It allows fast previewing and deletion of images. It has some features that are related to astro-photography. For example if you image in RAW+L quality mode APT will group the two files (CR2/NEF and JPG) to show one thumbnail. If you use the Delete button it will remove both files at once. When Preview mode is set to 1:1 the scrolled position will remain allowing to inspect same region in series of images.
Use Shift+Click on the Gear tab button in order to make the tab a floating window. Click on the "x" button or use Shift+Click to dock it back.
Img Tab

Preview Effects

1. Preview Effects
Opens/Close the Preview Effects dialog box which allows applying various effects on the loaded image or LiveView stream. The saved images are not affected. If there is asterisk after "Preview Effect" it means that one or more effects are activated.
Tries to intensify the EOS LiveView stream. Note that EOS Histogram has LiveView auto-stretching option that can give better results. In CCD/CMOS mode the LiveView can be intensified by CCD Histogram stretching or auto-stretching
LV Stack
Stacks number of frames from the EOS LiveView stream. The count is configurable from Advanced settings tab
Flips the image horizontally
Flips the image vertically
Applies sharpening filter
Makes the image negative
Increases the gamma with +0.25 on every click till +3.00. Double-click disables the effect
Rotates the image with +90 degrees clock-wise on every click. Double-click disables the effect
Increases the image brightness with +25% on every click till +200%. Double-click disables the effect
Note that performance can get slow (especially on a weak computer) if you are using Preview Effects over big images in combination with Preview Modes "1:1" and "1:1 Scroll"

Image Preview : On (Fit)

2. Image Preview : On (Fit)
Controls the preview of the loaded image in the "LiveView / Image Preview" panel. It duplicates the functionality of the same control in Camera tab in order to save tab switching.
On (Fit)
Shows the image in the preview area after every exposure. The image will be scaled to fit in the area
No preview
On (1:1)
Shows un-scaled part from the loaded image that fits in the preview area
On (1:1) Scroll
Shows scrolling buttons to select the image area that you want to see in mode “On (1:1)”. Use the central rectangle to view the center of the image
To scroll the image smoothly in “On (1:1)” or “On (1:1) Scroll” modes, hold the Shift key and drag with the mouse. You can also use the right mouse button to drag the image.
To switch quickly between “On (Fit)” and “On (1:1)” modes double click on the image. This allows to center the part of the image without scrolling.
If you double click on a scroll arrow, position will be moved to the corresponding border.

First Image

3. First Image
Loads the first image in the current folder.

Previous Image

4. Previous Image
Loads the previous image in the current folder.

Next Image

5. Next Image
Loads the next image in the current folder.

Last Image

6. Last Image
Loads the last image in the current folder.

Image Center Thumbnails

7. Image Center Thumbnails
Enables/disables the Image Center Thumbnails (ICT) mode. The ITC mode shows in the thumbnail the center of the image in 1:1 scale. Is is very handful to evaluate the guiding quality without need to load and scroll the image. The bad images can be deleted easily with the Delete button.
In left is a thumbnail of the whole image, in right is the thumbnail of the image center.
It is possible to toggle both modes for one image only with right click on it.

Upper folder (Back)

8. Upper folder (Back)
Goes to the upper folder - the parent folder of the current one.

Current Folder / Browse

9. Current Folder / Browse
Shows the current folder. Click on this button to open the folder selection dialog box.
Shift+Click on it to open the folder in Windows Explorer.

Images (and Folders)

10.  Images (and Folders)   
List of thumbnails. Double click on image thumbnail loads the image in the "LiveView / Image Preview" panel. Click with the right mouse button toggles between full image thumbnail (in left image) and image center thumbnail (right).
Shift + Double Click loads the CR2/NEF/FITS image into the associated application.
Shift + Ctrl + Double Click loads the JPG image into the associated application.
Double click on folder thumbnail opens the selected folder and makes it current one.
If the setting "Hide folders in Image Browser" in Main settings tab is enabled, the list contains only image thumbnails. If the option is disabled the list will include also thumbnails for the sub-folders of current folder.
Sample folder thumbnail:
In the lower right corner of image thumbnail are printed image types (files) represented by this thumbnail The possible values are:
One file only in JPG format.
CR2 and JPG
Two files - CR2 and JPG formats
Two files - NEF and JPG formats
Three files - CR2, TIFF* and JPG formats
Three files - NEF, TIFF* and JPG formats
One file only in FITS format.
*TIFF file is generated when the option "Convert CR2/NEF to TIFF" option is enabled in the Advanced settings tab.
Note that changing the current folder in the Img Tab has not effect on the folder where the images are stored.


11. Refresh
Refresh the list of the current folder and re-generates the thumbnails.

Go to Last Taken

12. Go to Last Taken
Goes to the folder where is saved the last taken image during the current imaging session (or previous session before new image is taken).


13. Info
If the file is in FITS format opens the FITS Header viewer. The information in it is updated if other image is loaded. The shortcut for this dialog box is Alt+I.


14. Delete
Deletes the selected file (or files if the thumbnail represents more than one). The file(s) are moved in the Recycle Bin, so they can be restored in case you change your mind. You can use also the Del key of the keyboard.