Thursday, June 1, 2017

How to tweet the URL of a web page successfully with a “Large Image Summary Card”

Example of a “Large Image Summary Card for an HTML document featuring Meeks Creek Falls, a waterfall in California's Desolation Wilderness

On Twitter users tweet short text—microposts.

You want to enhance your tweet with an image? Post it along with your tweet (see Posting photos or GIFs on Twitter).

You want to enhance your tweet with an URL of an exciting web page plus an illustrating image?  Use Twitter Cards.

Frequently, I design an image page (photo page): a web page (HTML document) that contains an image annotated with some informative text. I like to include such pages in Twitter posts by presenting the targeted image with descriptive text—microannotation. This stirs up reader's curiosity and invites them to click through. To achieve this, I employ Twitter's “Large Image Summary Card” technology (see Summary Card with Large Image).

Here, I'll demonstrate how it works (how it worked for me, anyway).  Follow these straightforward steps:

1. Add specific HTML meta tags to your web page.
2. Run the URL of the page through Twitter's card validator tool.
3. Tweet the URL

As an example page, I am using my Meeks Creek Falls picture and page. I inserted the following metadata lines into the head section of the respective HTML document:

<meta name="twitter:card" content="summary_large_image"/>
<meta name="twitter:site" content="@TravelingAhead" />
<meta name="twitter:creator" content="@TravelingAhead" />
<meta name="twitter:title" content="Meeks Creek Falls" />
<meta name="twitter:description" content="White water tumbling, splashing and spraying downcreek between naturally sculptured rocks" />
<meta name="twitter:image" content="http://www.axeleratio.com/pic/waterfall/meekscreek/img/Meeks_Creek_Falls.jpg">
<meta name="twitter:image:alt" content="Meeks Creek Falls next to Tahoe-Yosemite Trail">

Then, the document was tested with the Card validator at https://cards-dev.twitter.com/validator. After pressing the Preview Card button, I got the following preview display including an info log indicating successful card mark-up:



I submitted the following message with link and hashtags via @TravelingAhead:

#TYT Refresh yourself on a Tahoe-Yosemite Trail outing http://www.axeleratio.com/pic/waterfall/meekscreek/meeks_creek_falls.htm #MeeksCreekFalls #DesolationWilderness #Waterfall
 
The tweet showed up in the feed (https://twitter.com/TravelingAhead/status/869294403973660672) as shown at the top of this post.

Keywords: microblogging, microdata, meta tags, image collecting, annotated image.

Saturday, March 4, 2017

How can I edit the PATH variable under Windows 10?

The PATH variable is an environment variable of an operating system. The value of this variable is a list of folder (directory) paths. These specified folders are the names of installation paths—also called system paths—of executable programs.

Here, we are interested in the accessibility of programs installed in Windows 10. The list of folder names is searched when a program is called from the Run dialog box, a Command Prompt or Powershell command line and also when requested by a running process. Thus, inclusion of a program's directory path in the PATH list enables a program launch by program name without typing or providing the complete path.

Updated Windows 10 versions now contain a PATH editor that facilitates modification, addition and deletion of path names. Using this editor infrequently, I am finding it difficult to memorize the step sequence to access it. In the following, I am sharing how to tab down to the PATH editing dialog:

  1. Right-click the Windows icon (Start button) and, from the pop-up menu, select System to open the System window.
  2. From the menu items on the left side of the basic computer information, click Advanced system settings to open the System Properties window.
  3. Click the Environment Variables... button to open the Environment Variables window containing a scrollable System variables pane.
  4. In the pane, double-click the line with the system variable Path to open the PATH Editor (with the heading Edit environment variable). 
In the editor, select a line with a given installation path. Click the Edit button to modify the path or the Delete button to remove the path. To add a new path, click the Browse... button to open a dialog that assists you in finding the folder path you want to add. No typing required! Leave the editor by clicking the OK button to save your changes.