Hi Dima,
Thank you for your purchase.

Can you please try to clear your cache and see if it is working after clearing,

Hi Dima,

You have JS error on your admin page 

ReferenceError: wpmUi is not defined
 /wp-admin/:2019

It is because of the Custom Sidebars plugin and when it is active it breaks all JS on your admin page.
Please try to deactivate it and see if the display length will work.
Also I suggest you to contact Custom Sidebars and ask them what may cause this issue.

Hi Dima,


Please take a look at the attachment where you can see that the display length is working.
I saw that error on admin page when I logged in but now the error is gone.

Hi Dima,

Also in the admin area it now show all the data from the table. 
Take a look at the attachments.
Can you please try now to clear the cache.
Notice:
No errors also.

Hi Dima,

Take a look at the attachment from the editor.
Did you select to show 25 entries or more on this select box.

Hi Dima,

Sorry for misunderstanding.
The editor always shows first 10 entries(or less if you have less than 10) but you can change it on select box that i previously send you in the attachment.
If you take a look you in Additional settings for table and for Display length option you will see this :
"This options defines the default number of entries on the page for this table."
So it is just for the page and for the preview not for the editor.

Hi Dima

Ok we are looking table ID 7.

When you click preview I can see 43 ( Attachment 1)
When I add table ID 7 on page table shows also 43 rows ( Attachment 2)
Only when you click Go to editor it shows 10 because it is build in like that. It can not be changed to show 50 entries when you click on Go to editor but you can change it on select box when you editing it.

When I said "This options defines the default number of entries on the page for this table." I meant this Attachment 3.

Hi Dima,

Unfortunately there is no way to show all rows when you click "Go to editor" for now.
But you can click "Go to Excel like editor" and it will open all the rows that are in the table.
This is the url - Link

Hi Dima,

Based on what you are need with this you can solve it in multiple ways.

You can remove that dropdown with CSS if you don't need it.

If you only need to present all the data and do not want pagination at all you can find this file 

../wp-content/plugins/wpdatatables/controllers/wdt_admin.php

and in it, around line 1104 after 

$tbl->wdtDefineColumnsWidth($column_widths);

add

$tbl->disablePagination();

or if you want  to respect lenght saved on table settings instead of previous line add

if($table_data['display_length'] != 0) {
 $tbl->setDisplayLength( $table_data['display_length'] );
}else {
 $tbl->disablePagination();
}

This will show number of rows specified on table settings but will not update mentioned dropdown. 

Full solution with dropdown update will require code customization.