Information Presentation -- The Use of New Presentation Technologies in Electronic Sales Environments and Their Influence on Product Perception -- Research on Conveying User Experiences Through Digital Advertisement -- Preventing Decision Fatigue with Aesthetically Engaging Information Buttons -- A Modeling Research on How to Solve Ventilator Alarms from Behavioral and Cognitive Perspectives -- Evaluating Digital Nudging Effectiveness Using Alternative Questionnaires Design -- Cultivation System of Search-Query-Setting Skill by Visualizing Search Results -- A Support Interface for Remembering Events in Novels by Visualizing Time-series Information of Characters and their Existing Places -- Experimental Evaluation of Auditory Human Interface for Radiation Awareness Based on Different Acoustic Features -- Comprehending Research Article in Minutes: A User Study of Reading Computer Generated Summary for Young Researchers -- Possibility of Reading Notes as Media to Enrich Communications between Reader and Book -- Notification Timing Control while Reading Text Information -- Visualization and decision-making support -- Designing Data Visualization Dashboards to Support the Prediction of Congenital Anomalies -- Improving User Experience through Recommendation Message Design: A Systematic Literature Review of Extant Literature on Recommender Systems and Message Design -- Research on Innovative Application Mode of Human-Computer Interaction Design in Data Journalism -- Evaluating the Impact of Algorithm Confidence Ratings on Human Decision Making in Visual Search -- NearMe: Dynamic Exploration of Geographical Areas -- Decision Support for Prolonged, and Tactical Combat Casualty Care -- Lessons Learned from Applying Requirements and Design Techniques in the Development of a Machine Learning System for Predicting Lawsuits Against Power Companies -- Information in VR and multimodal user interfaces -- Asymmetric Gravitational Oscillation on Fingertips Increased the Perceived Heaviness of a Pinched Object -- Thematic Units Comparisons between Analog and Digital Brainstorming. -On-demand Lectures that Enable Students to Feel the Sense of a Classroom with Students who Learn Together -- Research on Perceptual Cues of Interactive Narrative in Virtual Reality -- Avatar Twin using Shadow Avatar in Avatar-Mediated Communication -- Effects of Interpupillary Distance and Visual Avatar's Shape on the Perception of the Avatar's Shape and the Sense of Ownership -- Impact of Long-Term Use of an Avatar to IVBO in the Social VR -- Multi-modal Data Exploration in a Mixed Reality Environment using Multiple Coordinated Views -- Perception of Illusory Body Tilt Induced by Electrical Tendon Stimulation -- Wearable Haptic Array of Flexible Electrostatic Transducers -- Investigation of Sign Language Motion Classification by Feature Extraction using Keypoints Position of OpenPose.

The two-volume set LNCS 12765-12766 constitutes the refereed proceedings of the thematic area Human Interface and the Management of Information, HIMI 2021, which was held as part of HCI International 2021 and took place virtually during July 24-29, 2021. The total of 1276 papers and 241 posters included in the 39 HCII 2021 proceedings volumes was carefully reviewed and selected from 5222 submissions. The papers included in the HCII-HIMI volume set were organized in topical sections as follows: Part I: Information presentation; visualization and decision making support; information in VR and multimodal user interfaces; Part II: Learning in information-rich environments; supporting work, collaboration and design; intelligent information environments.