Create a diamond in indesign.

[Martin Seccombe]

Something so simple has evaded me.

Create a diamond in indesign. Not illustrator.

ie draw a square and rotate 45 degrees but make it thinner.

I found Paths....

open paths. but how to make it symmetrical?

seems too simple to ask...  ;\ (

[Luke Jennings]

Rotate a square 45°, use the direct selection tool (white arrow) to select the left corner, then shift + select the right corner, then scale the width.

[John Mensinger]

(Just like Illustrator): Choose the Rectangle tool (you can do that by tapping the M key), and hold Shift while you click/hold/drag to draw a square.

Choose the Selection tool (black arrow—tap the V key), and move your pointer near one of the square's corners until it turns into a double-headed curved arrow, then press Shift and click/hold/drag to rotate. (The Shift key will constrain the angle, and you actually want 90°, not 45°.)

Still with the selection tool, move your pointer over one of the square's corner handles until it turns into a double-headed straight arrow, then click/hold/drag toward the center of the square to narrow it.

[Luke Jennings]

Here's two more ways:

Use convert shape to convert your square to a triangle, copy, paste in place, transform, flip vertical.

Rotate a square, copy, paste in place, group, scale width*, ungroup, delete one diamond.

*The stroke widths will become inconsistent, even if the preference to not include them in scaling is on.