Dimensioning problem. Arch tick at end of leaders is now a block!

When I dimension anything, I have a block of a Microwave at the ends of the leaders instead of an "arch tick."

When I see the "arch tick" block, it is now a microwave.

How can I correct this. I have no idea how his happened?

I'm not sure what a microwave is. Do you mean a tilde? This symbol: ~ ?

Did you change your Arrowheads setting in Dimension Styles on the Symbols and Arrows tab?

A microwave is a kitchen appliance.

You have somehow redefined those blocks as each other. I am not sure how to recover this. They will have to be switched back. Maybe someone clearly knows and can explain the procedure. It is too early in the morning here for my head to work very well, and I don't want to confuse you.

One of 2 scenarios happening:

(1) as DanaW's said, the block may be redefined. With some copy-n-paste to-and-from a blank DWG and then renaming and/or redefining you could fix this.

(2) The dimension style is using the wrong block. Open the DimStyle command, select the style you want (if not already selected). Click Modify, open the Symbols & Arrows tab, ensure the Arrowheads are the correct setting. Some use User Defined blocks, but then it's not shown as anything but "User Defined" in these lists - so you can't quickly tell if the correct block is used.

Help still needed.

Thanks for the suggestions, however, I can't seen to do the copy and paste to replace the bad "arch tick" block!

I did check and the dimension style does indicate "arch tick" it's just that somehow I managed to change the "arch tick" block to a stupid microwave block.

Rename the _ArchTick block to Junk.

Add a new dimension with the tick mark as the arrowhead. AutoCAD should regenerate a new tick mark.

Select all existing dimensions on the drawing and re-select the dimension style name from properties. This forces AutoCAD to apply the style to the selected dimensions.

find a drawing that has a good block, open it, then open the bad drawing, then in the design center, use the Open drawings tab to select the correct block, and redefine it in the "bad drawing"