+ **- sign**: Large portion of this control panel would be collapsed if you use this button. However you would see a **+ sign** to expand it again.
+ **⇅ sign**: This inverts the color of *ALL* panels.
+ **g/r/i/gri**: Use these buttons to display the images of all panels in different SDSS bands. **gri** displays composite colorful images based on g+r+i data.
+ **Trash bin**: Use it to reject a galaxy or flag it. To un-flag a galaxy you need to click on the trash bin logo again.
+ **Image Scaling Controller**: Use these to zoom in/out and rotate an image once it is **selected**. To select a panel, click on its image.
+ **PGC ###**: This shows the ID of the selected galaxy. If you click on this ID, a side window would display its image in Aladin Lite as well as its photometry status.
+ **Radio Buttons**: They show the current filter of the *selected* image. You can change the filter and press the **Load** button to change the *selected* image. To invert the *selected* image, use the **Invert** button.
![Step A](webpics/A.png) ![Step B](webpics/B.png)
+ **Step Indicators**: It takes 2 steps at most to find the inclination of each galaxy, based on which you see one of the above indicators (**left:** *step A* and **right:** *step B*). If you are on *step B* and you want to go back to the previous stage, you can click on the check-mark sign (✓). This way you can correct your mistake and choose another 5° category.
![Step A Button](helpics/step_A_button.png)
When you are at *Step B*, you can also use this button to go back to *Step A*.