ow_system_plugins/base/views/controllers/join-index.thml
paste this at the top of it 
then clear cache 

 <style>

.ow_menu_wrap{

display: none;

}

.ow_logo_wrap{

display: none;

}

.ow_site_panel{

display: none;

}

.ow_sidebar{

display: none;

}

.ow_footer_menu{

display: none;

}

.ow_content,

.ow_footer

{

width: 500px;

}

</style>

thanks

it worked i just need to center the the fourm now?

Cool

First of all, your changes will be overwritten while next update of the software, we do not recommend to do that directly in the core files. 

This can be done via general css styles in the theme customizer:

.ow.base_user_join  .ow_footer_menu, .ow.base_user_join  .ow_menu_wrap,.ow.base_user_join  .ow_console_body,.ow.base_user_join  .ow_logo,.ow.base_user_join  .ow_site_panel{display: none!important}

after that you won't need  to center anything and your changes won't be overwritten. 

this page is getting bookmarked 

paste this in the css customizer correct? i did just that and it didnt work

provide screenshot how you pasted it, please

what theme are you using by the way?

i am using proximus i notices evey thing except my logo and nav as well as blog on my side bar is gone ill be providing the screenshot shortly

heres my screenshot

in this case you need to contact theme developer and request how to do that, as his elements might differ from default theme styles and we do not provide assistance with 3rd party themes and plugins

thanks

ross after much testing i found that your code works. i did what you said and the 3rd party theme creator just couldnt understand what i was saying. Now the issue iam faceing is that the join fourm isnt centerd, do you have anyother ideas Ross?

this is the code i am using now, now once i end with a comma at the end of wrap it undo's everything that why i left it blank

.ow.base_user_join  .ow_footer_menu, .ow.base_user_join  .ow_console_body,.ow.base_user_join  .ow_logo, .ow.base_user_join .ow_site_panel, .ow.base_user_join  .ow_sidebar, .ow.base_user_join  .ow_header_img, .ow.base_user_join .ow_main_menu {display: none!important}

attached is another screen shot of what i have done.

You need ask your theme dev

Akeem when we apply these styles on the default theme the join form stays put and centered. Either share your URL or contact your theme developer to assist you