Marker
Veola Delzell
The ::marker CSS pseudo-element selects the marker box of a list item, which typically contains a bullet or number. It works on any element or pseudo-element set to display: list-item, such as the
- and elements.
These options specify the appearance of a marker label. A marker label is a string (often a single character) which will appear inside the marker. If you are using it with a custom marker, you can reposition it with the labelOrigin property in the Icon class.
Hello, I am trying to add marker symbols to a line. I added the marker layer and when I set the placement to any other option besides "at measured units", it works and I can see the markers on the line. However, when I set the placement to "at measured units" (what I want), it suddenly is no longer visible regardless of the interval I use. Does anyone have any thoughts or suggestions?
This attribute defines the coordinate system for the attributes markerWidth, markerHeight and the contents of the . Value type: userSpaceOnUsestrokeWidth ; Default value: strokeWidth; Animatable: yes
This attribute defines the orientation of the marker relative to the shape it is attached to. Value type: autoauto-start-reverse ; Default value: 0; Animatable: yes
\n This attribute defines the coordinate system for the attributes markerWidth, markerHeight and the contents of the .\n Value type: userSpaceOnUsestrokeWidth ; Default value: strokeWidth; Animatable: yes\n
\n This attribute defines the orientation of the marker relative to the shape it is attached to.\n Value type: autoauto-start-reverse ; Default value: 0; Animatable: yes\n
In later IC615 ISRs, you can also just use "m" for the first marker, and then "d" for a delta to the first, and another "d" to get the next delta. It leaves the last added marker selected so that the subsequent "d" adds a delta to the new point.
Please note that the version you are using is IC615 base release. In this release the second possibility mentioned by Markus will not work as "AB marker" was introduced in the later ISRs. Also in this release when you use the first possibility that is place the two markers and highlight/mark them using "ctrl" key, you will then need to go to Marker -> Create Delta Marker to create the delta marker. The shift + "d" doesn't work. All these are fixed in later releases. I would recommend you to upgrade to the latest release.
This article is dedicated to the gentleman I sat next to at lunch at CDNLive a while back who Is a CAD engineer busily supporting a large user community, but had been stumped by the question "How do I create a delta marker in VIVA?"
I'm sure he is not alone. Delta markers in IC6.1.5 ViVA (Virtuoso Visualization and Analysis Tool) are very powerful, but they can be a bit hard to find and unless you read the documentation (or this blog), you may never unlock all their useful capabilities. That's what I'm here for...
First, I want to direct your attention to a handy little document I put together a while ago which provides a 1-page Quick Reference to the most useful bindkeys in ViVA. Markers in ViVA are all about bindkeys, and for delta markers, you have to know just where and in what combination to use those bindkeys.
This is a special kind of delta marker. To create it, press A somewhere, then B somewhere else. You'll get 2 point markers labelled A and B and a delta label between them. Now, wherever you press A or B again, the original A or B marker will move to that spot and the delta values will update. Only one A/B marker allowed per window, but you can click the right mouse button (RMB) on the delta dimension line and select "Convert A/B Marker to Delta" so you can keep that information on the graph and continue playing the A/B game at another location.
If you have put down a bunch of markers (point, vertical, horizontal), you can select 2 or more of them (using Ctrl-click to select multiple markers) and then press Shift-D to get delta markers between all the selected markers. The cool thing about this is that you can mix point markers with vertical or horizontal markers to get delta values from a point to a line.
This will probably be your most commonly-used method of creating delta markers. Simply select a point, vertical or horizontal marker (M, V, H) and then wherever you press the D key, you will get a 2nd marker of that type and the delta between. Since when you create a point, vertical or horizontal marker, it remains selected, you can use the sequence M, D, D, D... or V, D, D, D... or H, D, D, D... to get multiple markers with delta values between them with just a few keystrokes.
Use the menu pick Marker->Show Delta Child Labels (or RMB in a blank area of the graph->Show Delta Child Labels) to toggle the visibility of the point marker labels at either end of the delta and only display the delta values. (IC6.1.5 ISR12) Helps reduce clutter on the graph.
Delta values between vertical markers now show up in the Vertical Marker table (IC6.1.5ISR12). Choose Window->Assistants->Vert Marker Table or use the built-in MarkerTable workspace to open the marker table. You can use Marker->Export->Vertical Markers to create a CSV file with all the marker values.
If any of the above is not clear, watching this video clip should help. Note that this short clip is part of a longer video available here, covering everything you need to know about using all types of markers in ViVA. If video fails to open, click here.
Since 1949, the Kentucky Historical Society has partnered with community members to install more than 2,400 historical markers across the Commonwealth that share the state's complex and remarkable history.
Did you know that each historical marker is only the beginning of a much longer story? Download our app, Explore Kentucky History, to find the locations of historical markers across the Commonwealth and enjoy additional history resources right from your smartphone. Download now from from the Google Play or Apple App Store. Or, from your Internet browser, access this same content at
If you or your organization are considering nominating a topic for a historical marker, we encourage you to thoroughly familiarize yourself with the recently updated program guidelines. Guidelines can be found on the Nominate a Topic for a Historical Marker page.
IHB is thrilled to share that we were awarded a grant from the William G. Pomeroy Foundation to help applicants with funding for new Indiana state historical markers during the 2023-2024 marker cycle!
These funds can provide crucial assistance for organizations and communities that may be interested in applying for new markers but may not have had the funding opportunities to do so in the past. Notably, we hope it encourages applications for markers commemorating underrepresented or marginalized communities, or in currently low marker counties across Indiana, to more equitably represent the rich and diverse history of our state.
Through this grant, the Pomeroy Foundation will help fully fund 3 new markers this cycle and provide partial funding of $1,000 for many others. These funds will cover the cost for manufacturing the marker and shipping and delivery of the marker and post. Applicants will be responsible for installation and any other costs associated with site permission or dedication plans.
The William G. Pomeroy Foundation is committed to supporting the celebration and preservation of community history. Since 2006, the foundation has funded over 1,600 roadside markers and plaques across the United States. IHB appreciates the support of the William G. Pomeroy Foundation as we work together to share the diverse history of our state. Learn more about the Pomeroy Foundation here.
Beginning in 2006, the THC began collecting a state-mandated $100 marker application fee to establish an account to offer funding incentives for special or priority markers." Funds are intended to address historical gaps, promote diversity of topics, and proactively document significant underrepresented subjects or untold stories.
As a deprecated feature, None also means 'nothing' when directlyconstructing a MarkerStyle, but note that there are other contexts wheremarker=None instead means "the default marker" (e.g. rcParams["scatter.marker"] (default: 'o')for Axes.scatter).
That's handy but we need more. What about changing the color, size, spacing, etc!? That's where ::marker comes to the rescue. It allows individual and global targeting of these pseudo-elements from CSS:
The list-style-type property gives very limited styling possibilities. The ::marker pseudo-element means that you can target the marker itself and apply styles directly to it. This allows for far more control.
That said, you can't use every CSS property on a ::marker. The list of which properties are allowed and not allowed are clearly indicated in the spec. If you try something interesting with this pseudo-element and it doesn't work, the list below is your guide into what can and can't be done with CSS:
Changing the contents of a ::marker is done with content as opposed to list-style-type. In this next example the first item is styled using list-style-type and the second with ::marker. The properties in the first case apply to the entire list item, not just the marker, which means that the text is animating as well as the marker. When using ::marker we can target just the marker box and not the text.
Changing numbered listsWhat about an
- though? The marker on an ordered list item is a number and not a bullet by default. In CSS these are called Counters, and they're quite powerful. They even have properties to set and reset where the number starts and ends, or switching them to roman numerals. Can we style that? Yep, and we can even use the marker content value to build our own numbering presentation.