Patent attributes
A head-mountable device can include an ability to adjust a fit as needed for a particular user or activity. For example, a light seal module that provides engagement of a user's face and transmits light from a display element can be coupled to an HMD module. The light seal module can be provided in a wide variety of adjustable sizes and/or shapes to allow any given user to select an appropriate one for optimal alignment of an HMD module. The head-mountable device and/or other electronic devices can be operated to guide a user to select the optimal light seal module arrangement for use with an HMD module. For example, the head-mountable device or another device can include sensors for detecting an identity of a user, features of the user's face, forces distributed on the face when worn, and/or an activity being performed.