How can i add a background on login page ? i checked jqueryBxslider.css and everything seems to be ok , where i have to change to enable my background image?
I guess you are talking about logo image.
If you develop for web you should already have installed Firebug add-on for Firefox. Right-click on the logo and then click Inspect Element with Firebug. You will see html code for logo image and it is something like this 
If you want to change logo you should create your own image, name it logo_yetiforce.png and put it in storage/Logo, replacing old logo.
If you are talking about background than you can see that background color is defined in layouts/basic/skins/login.css (login.min.css) for Responsive Layout and in layouts/vlayout/skins/login.css (login.min.css) for Default, Vlayout.
Google Chrome can also inspect elements so you actually do not need Firebug for Firefox.
Thank You @nikdejan
logo can be change in the admin panel in Company details
no, i dont mean the logo, the logo its easy to change, i mean the background, in this case he doesn't exist , or can say that its white
Well, I told you where relevant css file is. You need basic css knowledge to finish the job. If you don't know how, then you should ask on some other place, not here.
ah ok , i had not seen that, sorry , i'm going to try to change it, thank you
i got it, if any body want to add a background go to path nikdejan said(layouts/vlayout/skins/login.css and layouts/basic/skins/login.css), and in both files change "body{background:#f0f0f0}" to "body{background-image: url("blabla.jpg")}", hope it help you.
Newer version seem to have moved this file to:
public_html\layouts\basic\modules\Users
For me, I updated the .min file, you need to change this lines:
html,body{background:# }
@nikdejan new location is here: public_html\layouts\resources\Logo\
and favicon here:
public_html\layouts\basic\images\favicon.ico
@ldgbc
For me, I updated the .min file, you need to change this lines:
html,body{background:# }
What did you change in that area to display an actual background instead of just the plain blank login screen with adjustable color?
Update: Ok so I got the bvackground to display using your suggestion with @yozhi tweak "body{background:#f0f0f0}" to "body{background-image: url("blabla.jpg")}", but I had to remove the ", at the end.
However, it's still collaged and not full screen mode. It's repeating the background and I know you can do no-repeat but where would that go?
Disregard my previous post. Apparently it was as simple as a cache issue. So the above method worked perfectly for me and now my background image displays correctly as it should so problem resolved. Thanks again guys for pointing me in the right direction.
Yetiforce 2019:
When making the change, and putting a background image the console throws the following error:
ย Refused to load the image 'URL.jpg' because it violates the following Content Security Policy directive: "img-src 'self' data: a.tile.openstreetmap.org b.tile.openstreetmap.org c.tile.openstreetmap.org ".
For what is this? in which file "img-src" is authorized, is it safe?
Most helpful comment
i got it, if any body want to add a background go to path nikdejan said(layouts/vlayout/skins/login.css and layouts/basic/skins/login.css), and in both files change "body{background:#f0f0f0}" to "body{background-image: url("blabla.jpg")}", hope it help you.