What is the difference between flipping horizontally and vertically?

Flip horizontally mirrors the image left-right, like a reflection in a mirror standing next to it. Flip vertically turns it upside down, like a reflection in water. For the classic mirror effect on a photo or an arrow, you want horizontal.

Why doesn't my text mirror when I flip the text box?

Google Slides never mirrors the characters inside a regular text box; the flip applies to the box, not the glyphs. Insert the text as Word Art (Insert → Word art) instead: Word Art behaves like a shape and mirrors properly when flipped.

How do I rotate an image exactly 45 degrees in Google Slides?

Right-click the image, open Format options → Size & rotation, and type 45 in the Angle field. To set the same angle on many objects at once, the Auto Layout & Grid panel has an angle field that applies to the whole selection in one click.

Can I flip several images at once?

Yes. Select them all (Shift+click or drag a selection box) and flip. With the Auto Layout & Grid panel, one click mirrors every selected object in place around its own center, which is what you usually want for icon sets and arrows.

Does flipping or rotating an image reduce its quality?

No. Flips and rotations in Google Slides are transforms applied to the original image, not re-exports. They are lossless and fully reversible: flip the image back and it is exactly as before.

How to Flip or Mirror an Image in Google Slides

Flipping one image takes ten seconds once you know where the option hides. This guide covers that, the mirrored-text trap that catches almost everyone, exact-angle rotation, and the fast way when there are twenty arrows to flip instead of one.

Flip an Image With the Arrange Menu

Click the image to select it.
Go to Arrange → Rotate.
Choose Flip horizontally to mirror it left-right, or Flip vertically to turn it upside down.

Which flip do you want? Horizontal flip is the "mirror" most people are after: a person looking left now looks right. Vertical flip turns the image upside down, useful for reflections and symmetrical decorations.

The same menu also has Rotate 90° clockwise and Rotate 90° counter-clockwise, which cover most rotation needs.

Mirror Text in Google Slides (the Word Art Trick)

Here's the trap: select a text box, flip it horizontally, and… nothing visible happens. Google Slides does not mirror the characters inside a regular text box.

The workaround is Word Art, which behaves like a shape:

Go to Insert → Word art, type your text and press Enter.
Select the Word Art object, then Arrange → Rotate → Flip horizontally.

The letters now mirror properly. Style the Word Art's fill and outline to match your design.

Rotate an Image to an Exact Angle

The rotation handle above a selected image is fine for freehand work. For a precise angle:

Right-click the image and choose Format options (or Format → Format options).
Open Size & rotation.
Type the exact angle in the Angle field.

This works well for one object. For several objects that all need the same angle, it means opening Format options for each one in turn.

Where It Gets Tedious

Every flip is three menu levels deep (Arrange → Rotate → Flip…), and every precise angle is a trip through Format options. That's fine once. It stops being fine when you're mirroring a set of arrows, reorienting a batch of icons, or straightening photos across a deck.

One Click for the Whole Selection: Auto Layout & Grid

Auto Layout & Grid is a layout side panel for Google Slides (align, distribute, arrange, grid), and its Position tools cover rotation and mirroring:

Install it from the Marketplace, then open Extensions → Auto Layout & Grid → Open panel. The panel stays open while you work.
Select any number of images, shapes or icons.
Click Flip horizontal or Flip vertical: every selected object mirrors in place, around its own center.
Or use Rotate 90° buttons, or type an exact angle once and apply it to the whole selection.

Verdict: for one image, the Arrange menu is all you need. For batches, or when you're doing layout work anyway, the panel turns a menu dig into a single click.

While you're tidying slides, the same panel handles alignment and spacing too: see how to align and distribute objects in Google Slides.