See the steps below.
Explanation
Use the Document Inspector to Remove Hidden DataTo open the Document Inspector, click File > Info > Check for Issues > Inspect Document. The PowerPoint Document Inspection window shown below opens up.
Click Inspect to identify hidden content, and click Remove All to remove the item of your choice.

See the steps below.
* Select the chart you want to modify. The Design tab will appear.
* From the Design tab, click the More drop-down arrow in the group. Clicking the More drop-down arrow.
* Select the desired style from the menu that appears. ...
* The chart will appear in the selected style.

See the Steps below
Explanation
In PowerPoint, a placeholder is a pre-formatted container on a slide for content (text, graphics, or video). The pre-set formatting makes it easier to format slides consistently.
You format a placeholder in Slide Master view. Then you use the placeholder-add content to it-in Normal view.
The pictured slide has two rectangular placeholders:
* The (upper) Title placeholder prompts the user for text and formats it in the default Heading font, size, and color
* The (lower) Content placeholder accepts text, or a table, chart, SmartArt graphic, picture, or video, as indicated by the clickable icons at its center.
Topic 1, Art SchoolExhibit.

See the steps below.
* On the slide, tap where you want to add the link.
* On the Insert tab of the ribbon, select
* Select Insert Link. ...
* In the Text to display box, enter the text that will be the
* Select Insert.

See the steps below.
Explanation
Use the 3D control to rotate or tilt your 3D model in any direction. Just click, hold and drag with your mouse.
Drag the image handles in or out to make your image larger or smaller.