Bug 46595 - Add choice for vertical align to optical center
Summary: Add choice for vertical align to optical center
Alias: None
Product: LibreOffice
Classification: Unclassified
Component: LibreOffice (show other bugs)
(earliest affected)
Hardware: All All
: lowest enhancement
Assignee: Not Assigned
Keywords: needsUXEval
Depends on:
Blocks: Object-Selection-Alignment Page
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Reported: 2012-02-24 15:50 UTC by Juudaime
Modified: 2021-04-23 07:55 UTC (History)
2 users (show)

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Description Juudaime 2012-02-24 15:50:25 UTC
LibreOffice allows aligning objects to geometric center of the page but choice for optical center is missing. Optical center is different from geometric while it has greater use in typography and content presentation. 

Aligning manually might be quite difficult especially for inexperinced users so adding this feature would highly improve usability for works requiring profesional looking design.
Comment 1 sasha.libreoffice 2012-04-03 07:49:54 UTC
Thanks for new idea
But what is optical center? How it differs from geometric? Please, give link to explanation or explain.
Comment 2 Juudaime 2012-04-03 11:59:11 UTC
To cite properly:

"Optical Center is the spot that the eye sees when it first encounters a page. The optical center is slightly above the mathematical center of the page. It takes a compelling object indeed to pull the eyes away from it. The optical center is the starting point." <http://www2.selu.edu/Academics/Faculty/galkadi/233/DTPNOTES%20modified.htm>

Optical center is closely related to golden ratio and golden ratio is afaik most used way to construct it. The difference between geometric and optical center can be seen on this picture: <http://www.pixy.cz/pixylophone/obrazky/zlatyrez3.gif> (optical center is green)

There are also some slightly different ways to construct it:

Following picture shows one of them: <http://antypa.cz/wp-content/uploads/2010/03/Picture-38.png>

One simplified method to find optical center is descibed at <http://books.google.cz/books?id=r5arjo6JSgQC&pg=PA29&lpg=PA29&dq=optical+center+typography&source=bl&ots=XoQBBNOU3r&sig=rj4Rm18HZcpco3sbXk5SGIXcLT8&hl=cs&sa=X&ei=QUB7T-urBobLhAfl881p&redir_esc=y#v=onepage&q=optical%20center%20typography&f=false>
Comment 3 sasha.libreoffice 2012-04-04 02:14:05 UTC
Thanks for links. It is very interesting. Please, if possible, create and attach picture how dialog should look like after adding this option. It will greatly help while implementing this option.
Comment 4 Joel Madero 2012-06-29 15:28:46 UTC
This is an interesting one, I'm going to mark as NEW for the time being and put as LOWEST priority (since it's really easy to manually do this). I'm not sure if we'll ultimately do this as it adds a layer of confusion for users not as knowledgeable as you are but, it's an interesting point. Please provide attachments when you find the time.
Comment 5 Buovjaga 2021-04-14 08:30:54 UTC
Design team: needs re-evaluation
Comment 6 Heiko Tietze 2021-04-23 07:55:32 UTC
Had this topic on the agenda for the design meeting but there was no further input. I believe those special solutions are well suited for extensions but shouldn't occupy coding resources.