(1) How to make smilies. You can not use the normal way like :-), you can but it will not shown as you want. Use the codes below and in the preview you will see the smilie. You can also use it in comment fields.
😁😁 😉😉😂
😂 😊😊😃
😃 😋😋Please find a full list here: https://steemit.com/emojis/@blueorgy/steemit-emojis-master-list
(2) Another problem for me was to center pictures or some of my textes. For that please use
At the beginning of the the text/image <center> And at the end </center>
f.e. <center>This is a test text</center>(3) For creating two Column please use
For the left side <div class=pull-left>Text for the left side</div>
For the right side <div class=pull-right>Text for the right side</div>
Example
This text will be shown in the left column.
This text will be shown in the right column.