Navigation
Moving and zooming the image
Use the following gestures to navigate the image:
- Pan to move the image.
- Pinch to zoom in or out and rotate the image.
- Double-tap to zoom in (zoom x2).
- Long press the zoom-out button
for an immediate zoom out.
If the current zoom ratio is higher than the default for the fractal type, it will be changed to the default.
Otherwise, the image will be zoomed out to the minimum zoom ratio of 0.01. - Touch and hold the screen to zoom in. You may move your finger while zooming to change the zoom center. This feature is disabled by default. You may turn it on using the Settings / Auto zoom / Auto-zoom on long press option.
After the gesture is completed, the app continues to move the image smoothly slowing down. Tap the screen to stop the movement. Use the Settings / Behavior / Smooth movement deceleration option to change the duration of the movement, disable this feature, or even make the movement continue until you stop it.
The scrollbar is hidden when moving or zooming the image.
Real-time zoom video
Enjoy real-time zoom video:
- Tap the zoom-in button
to start a real-time zoom-in or the zoom-out button for a zoom-out. - Tap the screen to stop auto zooming. You may also stop it by pressing the button again.
- Pan to move the image while zooming.
- Switch the tilt button
for controlling the position by tilting the device. The button is visible only during auto-zoom.
You may change auto-zoom options (including zoom speed) in the Settings / Auto zoom.
You may start real-time zoom-in into the spot saved in the gallery (built-in or your favorite). Long press a spot in the gallery and tap Zoom video item from its context menu.
The app can automatically adjust coordinates when zooming in to avoid entering areas with little detail (where iteration count does not vary). You may switch this feature on/off using the Settings / Auto zoom / Auto guiding option. This is an experimental feature not working perfectly yet.
As the image is rendered on the fly, its quality during auto-zoom strongly depends on its complexity (mainly on the iteration count) and the auto-zoom speed. When the quality is reduced, it is displayed in the status bar.
Zoom-in stops when the maximum zoom ratio for the fractal type is reached. Zoom-out stops when the default zoom ratio for the fractal type is reached. When zoom-out is started at the default (or lower) zoom ratio, it stops when the minimum zoom ratio of 0.01 is reached.
Deep zoom
Above a certain zoom level (around 5e+12 depending on the screen size) the app enters the deep zoom mode and starts using custom floating-point numbers. This significantly slows the computation and results in reducing the image quality.
The higher the zoom is the longer numbers are necessary (up to 1024 bits long) and the slower the computation is. Zoom is limited to 1e+300 but when you exceed 1e+100 the computation can take some time and you may need the patience to get a full quality image. Fortunately, there are lots of interesting spots at much lower zooms.
Deep mode is indicated in the status bar. In the Advanced mode, the status bar also shows the length of currently used floating-point numbers.
Deep zoom is not supported for all the fractal types. It is currently supported for 25 of them. It is not supported for custom fractal types.
Image rotation and stretching
The pinch mode button icon indicates the current pinch mode.
The default mode is zoom 
.
Use this button to display the pinch mode menu and choose one of the available options:
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Zoom & rotation | Use two fingers to zoom in and out, and rotate the image at the same time (default setting). |
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Zoom | Pinch to zoom in and out (rotation disabled). |
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Rotation | Use two fingers to rotate the image (zoom disabled). The current rotation angle (in degrees) is displayed in the pinch mode menu.
Long press the menu item to input the desired value using the keyboard. |
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Stretch | Pinch to distort the image by stretching or squeezing it in one direction.
The current stretch factor is displayed in the pinch mode menu. The maximum stretch factor is 100 and further stretching is not possible. Stretching the image may change the zoom.
Long press the menu item to input the desired value using the keyboard. |
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Reset stretch & rotation |
Remove stretch and rotation from the current image and switch back to zoom pinch mode. |
An example result of stretching a Burning ship fractal zoom.
Distraction-free mode
Use the visibility button 
to enter the distraction-free mode.
The
Admire mode
The app automatically hides the scrollbar and buttons after a specified time without user interaction. The default time is 30 seconds but you may change it (or turn it off) in the Settings / Behavior. Tap the screen or pan/pinch the image to leave the admire mode and restore the scrollbar and buttons.
Back button
On the app's main screen, you can use the device's back button to undo your changes and go through previous images within the current session.
You may restore the default back button action using the Settings / Behavior / Back button navigates option (you will still be able to use the History to undo changes).
On any other screen, the back button normally returns to the previous screen. There is no back or close button to save precious space on a mobile device. The exception is the tutorial screen where the back button returns to the previous page and you can use the close button to exit the tutorial.
You restore your changes (go forward) using the History.
History
Use 
History option
from the action menu
to show the history of the location changes with the current location highlighted.
Tap the item to restore the location. This works like using the Back button multiple times.
Scroll down to see older changes. When you used back button or restored an item from the history, you can scroll up to see the changes that follow the restored item.
Your subsequent changes will be inserted just above the current item.
The history is limited to 10000 items and only shows changes made during the current session. Subsequent taps on the scrollbar's forward or back thumb are treated as a single change.
Status bar
By default the status bar is hidden and rendering progress is indicated only by a progress bar displayed on the top of the screen. Use the Settings / Appearance Show status bar option to make it visible.
The status bar displays the current zoom ratio, iteration count range, and image size. When rendering, it displays also the current quality (as the size extension), rendering progress and estimated time remaining.
Use the Settings / Appearance Show coordinates option to make the status bar displaying the current coordinates. In the deep zoom mode, only approximate coordinates are displayed.
An example status bar while rendering.
When using Supersampling, the status bar also shows the current supersampling settings.
Action menu
Use the menu button 
to display the app's action menu:
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Quit | Leave the app. |
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Unlock Premium | Unlock Premium features. |
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Add to Favorites | Add the current spot to the Favorites. |
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Share | Share an image or link to the current spot. |
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Save Image | Save the current image to the device's gallery, or Render high resolution image. |
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Save Video | Create a video using the current location. This feature is not available on the devices with Android versions lower than 6. |
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History | Show History of location changes. |
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Import | Import shared content from a file, Open a location from image, or Paste a location link from the clipboard. |
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Tutorial | Show this tutorial. |
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@MandelBrowser | Go to the app's Instagram profile. |
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Image size | Change the image size. |
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Supersampling | Change Supersampling options. |
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Settings | Change the app's Settings. |