For landscape photography, a camera with a high resolution sensor and wide dynamic range is ideal to capture the details and colors of the scenery. A full-frame DSLR or mirrorless camera with a wide-angle lens would be a good choice for capturing the vastness of landscapes. For street photography, a compact and discreet camera with fast autofocus and good low-light performance is preferred. A mirrorless camera with a prime lens or a high-quality compact camera would be suitable for capturing candid moments and street scenes without drawing too much attention. **

To mix portrait and landscape videos, you can use video editing software to adjust the orientation of the videos. You can rotate the portrait videos to landscape orientation or vice versa to create a cohesive look. Additionally, you can use techniques such as adding borders or background images to seamlessly blend the different orientations together. Experimenting with different layouts and transitions can help you create a visually appealing video that combines both portrait and landscape footage. **

To switch from landscape to portrait mode on a device, you typically need to rotate the device physically or adjust the settings in the display settings. On most smartphones and tablets, rotating the device from horizontal to vertical orientation will automatically switch the screen from landscape to portrait mode. If the device does not automatically switch, you can go into the display settings and manually change the orientation from landscape to portrait. **

To switch from portrait to landscape mode on a smartphone or tablet, simply rotate the device 90 degrees to the left or right. Most devices have built-in sensors that can detect the change in orientation and automatically adjust the screen from portrait to landscape mode. Some devices may also have a screen rotation lock that needs to be disabled in order to switch to landscape mode. **

The main difference between camera settings for landscape shots and portrait photos is the aperture setting. For landscape shots, a smaller aperture (higher f-stop number) is typically used to achieve a larger depth of field and ensure that both the foreground and background are in focus. On the other hand, for portrait photos, a larger aperture (lower f-stop number) is often used to create a shallow depth of field, resulting in a blurred background that helps to emphasize the subject. Additionally, the focal length and composition may also vary between the two types of photography. **

To switch from landscape mode to portrait mode on most devices, you can simply rotate the device 90 degrees clockwise or counterclockwise. The screen should automatically adjust to the new orientation. Some devices may also have a setting in the display or accessibility options that allow you to manually switch between landscape and portrait modes. **

I'm sorry, but as a text-based AI, I am unable to physically change the orientation of a picture from portrait to landscape. However, you can easily do this using photo editing software or tools like Microsoft Paint, Adobe Photoshop, or online editing platforms. Simply open the image in the software, locate the option to rotate or change orientation, and save the picture in landscape format. **

I'm sorry, but as a text-based AI, I am unable to change the format of a picture from portrait to landscape. You would need to use a photo editing software or app to make that change. There are many tools available that can help you easily rotate or resize images to the desired format. **