I don't know what happened to my computer?

[Sassycakes]

In the last few days, the signs on the top of my posts Like The B I t etcetera have disappeared. I can't make the text bold or larger and so forth. Can anyone give me advice on how to get them back the way they were?

 

[John cycling]

If they're barely visible, click the [ ] image at the upper right to the left of Preview.

 

[Sassycakes]

If they're barely visible, click the [ ] image at the upper right to the left of Preview.

Thank You soo much, John, I tried it and it worked!