Remember Connection Line preferences (type, thickness, color, arrowhead)

In the meantime you could try to make a template with several objects, formatted as you want them.

Then copy those object into new boards. I'm not sure if it will take those as defaults for that board tho. But it's worth a try?

I would like the default for the line to be straight.  Is there a way to set that as my default?  I agree tired of repeatedly changes things would be get to have personal defaults that I use all the time.  Love Miro but some of the actions are repetitive and time consuming

I can’t upvote this enough times. I have a strong preference for curvy vs angular lines. I like to scale my boards to the default sticky sizes. I like to use dark backgrounds with light lines/shapes. I wish I could set new defaults, but I also just wish that after I had changed them for a board the board would remember what I wanted on that board. It seems to do this within a session (or is it a frame?) and then forget again. 

hey @Miro Community Team would you please provide some insight about this (and all the other requests related to the ability to set defaults (shapes, sizes, colors...)? 

There is a workaround here: https://help.miro.com/hc/en-us/articles/360017730733-Connection-Lines

Can I apply one style to all connection lines on my board?
- Yes, use the following workaround: select a line, click three dots on the context menu, and copy a style of the line. Then select all objects on the board (you can use a shortcut Ctrl + A (for Windows) or Cmd + A (for Mac), filter connection lines, and choose Paste style under the three dots of the context menu.

Workaround is OK if your know what you are preparing and are just rendering the presentation, but in an exploratory mode, it takes me out of the problem domain to have to eithe fix my lines or make a mental note to come back and fix later.

Hi @Steve Carter and everyone else

Thanks so much for taking time to add your insights. Our team is reviewing this, and it is open for votes and comments. For those coming across this idea, if you feel this would be helpful for your business, please be sure to vote for it and leave a comment about your use case to help our team scope this request!

I would really like to be able to open an Entity Relationship Diagram, and draw a new line, and have it connect with a relevant arrow head.  Doesn’t have to be the correct one, but at least it would be nice if it *might* be the right one - the default could be 1-to-many, and you’d probably at least get one side of it correct (or 1-to-1 since many-to-many relationships are pretty rare in an ERD).

Similar for other UML style diagrams - it would be nice if the connecting lines had defaults, or the board had a set of default line styles or heads that would show up at the top of the choices, because right now, in an ERD, not only do I get the wrong connectors by default every time, but I also have to open the dropdown, and click the “...” to even see the relevant connectors.

UPDATE: I finally figured out that if I drag one line from an entity to another, and switch the connectors, the subsequent lines all use that connector!  This is helpful if you start with en ERD shape that has those connectors, and copy from that shape!  Somehow I had ended up with shapes that were set to the wrong default, but this works quite well!  (FWIW)