Why do slides have to be reversed when showing slides?

Because the slide has to be reflected and projected several times before it reaches the screen, the image has to be flipped several times during this time.

Slides work better when inserted upside down.

Because after reflection, the image is reversed.

The slide projector reflects an enlarged image.

Slides are reflected and projected several times before they reach the screen.

Slides are reflected and projected before they reach the screen.

According to the principle of reflection of light.

The image of the slide is an inverted virtual image, and in order for us to see it upright, we have to insert the slide upside down.

In order to make the image on the screen upright, the left and right sides are accurate.

The mirror nano head of the slide projector is equivalent to a convex lens, when the object distance is in the middle of two times the focal length and one time the focal length, it can be known from the imaging law of the convex lens, and the real image of the inverted magnification At this time, the screen distance lens should be greater than two times the focal length

Therefore, the answer is: between one time the focal length and two times the focal length of the ruler; Pour; More than two times the focal length

Cause: A custom slideshow is set in the slideshow settings, and all slides are not selected.

Solution: 1. First, click Custom Slideshow in "Slide Show" to see how many slides are missing.

2. At this time, click the "Set Slideshow" option in the "Slideshow".

3. You can open the dialog box to set up a slideshow, and you can see that the selected one is "Custom Slideshow 1" under the "Show Slideshow" column.

4. Then change the originally selected "Custom Show" option to the "All" option to display the slideshow page in its entirety.

See if the ppt you set up a few pages ago has jumped to the first few or something like that.

Or try to demonstrate it again.

In the slide show, select the setting of the exhibition mode, and set the number of pages from the first page to the first page in the pop-up dialog box;

But the flaw of this approach is that you can only set up coherent slides.

Have you used the custom projection feature?

Click the menu "Slide Show" and "Custom Show" to add the corresponding page of the slide you want to show, and don't add what you don't want, so that some of them are gone when you show them, I hope it can help you.

You can choose the projection method as automatic.

Hello! I'm also having the same problem, can you solve it, can you help me?

1. Open PowerPoint

2. In Windows 10 system, click the "System Message Notification" button and click the "Projection" button, as shown below.

3. Connect the computer to the projector and set the mode to "Extended" in the "Display Settings".

4. Add a note in the "Remarks Area" at the bottom right of the PPT that needs to be shown. For example, "Hello, welcome**".

5. Next, set up the show, and select "Slideshow" - "Set up Slideshow".

6. In the pop-up dialog box, the slideshow is displayed in "Monitor 2" (that is, the projector screen), and select "Show Speaker View".

7. Finally, click on the projection and you will find that the screen on the computer screen is different from the picture displayed by the projector, and you can speak according to the notes, and the projection screen does not display the notes.

Take ppt2011 operation as an example:

1. After opening the PPT, click the slideshow on the menu bar above.

Your monitor is widescreen, so it will not be satisfied, you can change it like this, in Word, select the file, then select the page settings, select the slide size to custom, and then adjust the width inside. Just make the width bigger.

Adjust the resolution first, try one by one, find one that can't be determined by full-screen resolution, and then right-click on the first item on the desktop ATI Catalyst Control Center (you can choose advanced for the first time), and then in the drop-down item of the display card in the upper right corner - desktop & monitor The appearance of a small notebook appears in the lower left corner, click on the inverted triangle option above - and then select full-screen OK, and adjust each resolution to full-screen.

Resources.

Hello! This is because the slicing method is set incorrectly.

If you are using a lower version such as PowerPoint 2003, click "Slide Show" and "Slide Switch" on the menu, find "Change Method" at the bottom of the sub-window on the right, and tick the small box before "When clicking the mouse";

If you are using PowePoint 2010 contour version, click "Switch" on the menu, find "Change Method" on the right side of the small window that appears above, and also tick the small box before "When clicking the mouse".

Try again, what did you find? Good luck!

This question is up to me, it takes a little time to type, so please be patient.

Hello! This is because the slicing method is set incorrectly. If you are using a lower version such as PowerPoint 2003, click "Slide Show" and "Slide Switch" on the menu, find "Change Method" at the bottom of the sub-window on the right, and tick the small box before "When clicking the mouse"; If you are using PowePoint 2010 contour version, click "Switch" on the menu, find "Change Method" on the right side of the small window that appears above, and also tick the small box before "When clicking the mouse".

Try again.

You mean that there are many ** slides installed in the classroom, maybe your projector is not installed correctly.

The following points must be taken into account in the installation of the projector:

1.Calculate the distance between the projector and the screen (determined by the screen size). The height of the screen hoisting and the distance from the first row of seats should be calculated according to the principle of ergonomics, so as to avoid students looking up at the screen excessively, so that the screen falls into the student's easy field of vision, so that students can look at the screen and copy notes in a more comfortable posture, reduce students' visual fatigue, and improve learning effect and efficiency.

2.The upper edge of the screen hanging on the wall should be on the same horizontal line as the projector lens on which the projector is lifted, and the center point of the projector lens should be on the same vertical line as the center point of the projection screen.

3.Select the appropriate size mounting hanger, install the screws for fixing, and tighten the bolts into place.

4.Adjust the keystone, focus, etc. of the projection screen.

The computer doesn't need to be changed.

Almost all projectors have a setting for the hanging method.

It's in the projector's OSD menu.

The installation method can be selected as "hoisting".

There may be hidden things on the page, duplicated or invisible things in someone else's template. The simple way is to delete this page (not delete the content, but delete the page) and create a new page to do your content and animation.

Do you have to press the left mouse button three times?