Help with css on default theme

#1 in single.php

<div id="content" class="widecolumn">

change “widecolumn” to “narrowcolumn”

it does not work ??

Sorry to hear that. ??
It worked for me, it’s in the docs here, and I’ve seen it work for others via these forums. Don’t know what else is different in your files.

1.change “widecolumn” to “narrowcolumn”
+ add the call for the sidebar (see how it is done in the index!)

2. Editing the sidebar.php file and the stylesheet. Google for “styling nested lists”.

3. That’s a good search term here in the forum: “sidebar down IE”

4. Finding_Your_CSS_Styles

And if you are as inexperinced as you said you are – you should get another theme and never try to mess around with the default. It is difficult even for experienced designers…
Lots of good themes: https://themes.wordpress.net

1. I have no idea which part of the index calls for the sidebar as you say.

2. Will do although I have tried some of that before with no success and never heard the word “nested” before (am not english)

3. will do.

4. already read that article over and over but will do again.

You know I like to have my weblogs my own way which is why I customize the theme (and I didn’t know the default theme was so difficult, it just had the right base for what I wanted). I always make sure I have tried everything I could before I go ask to the forum because I know that I am going to get a lecture about how I should not try to customize anything if I don’ know how to do it. I will continue to come to forums hoping no to get such lectures but sometimes I wonder why are forums for.

Thank you anyway for your help.

1. Eventually found on the French forum.

2. I have tried this in sidebar.php :

<li><h2><img src="https://www.lautreatelier.fr/blog/images/data/archives.jpg" alt="Archives"/></h2>
</li>
<ul>
<?php wp_get_archives('type=monthly'); ?>
</ul>

But it does not work, what could I do ?

‘calling’ is a primary function of php files
For example, your index calls your header which calls your stylesheet which is where you have inserted your other image urls.
Changing an image or font color in the stylesheet is one thing, but modifying the original structure is coding (rather than just minor hacking).
Your css has been altered from the default beyond a few cosmetic modifications.
You can’t just stick html into a php file with no relationship to what the file does in its place in the operating sequence.
Your sidebar is widgetized and you’re running plugins on top of that, and I’m guessing that you haven’t familiarized yourself with how all this works.

Dotio7, in order to make modifications to the extent you wish, you do need to understand the php and css (including things such as nesting). If you get really stuck at any particular point in your learning curve then, in my experience, help is usually graciously offered here. I’m new to these things also, blogging is a hobby for me, and I spend a bit of time here every day reading the forums and docs. It takes time and application to learn how things work before you can do whatever you wish. People spend years at it.

Thank you Verabass for your input. I do spend a lot of time reading documentation and trying to understand how it works, I was only saying that for the exemple of nesting this is not an english term I know, that does not mean I am not trying to understand how it works. When I come to a forum it is only after hours of reading, researches, trying. It is the 6th blog I work on and only the 2nd on WP.
I have always been very grateful for people on forums who take time to provide their help to people like me but sometimes get tired of such people lecturing me. All I want is a bit of help on things I cannot seem to get working right from people who know how to do it. Isn’t it the purpose of forums ?

I did found on the French forum how to call the sidebar, thanks for the explanation, always good to take.